Blockbench 5.0.0

What's new in this version:

UI Changes:
- Upgraded the design of Blockbench, introducing more rounded corners, gradients, shadows, and paddings, and improving usability
- Multiple panels can now be added into one as tabs
- Renamed former "Element" panel to "Transform"
- Added "Element" panel as a tab behind "Transform"
- Added Montserrat as new headline font
- Settings that were added by a plugin now display the plugin name in the UI
- Added modifier key hint for moving panels without docking
- Updated keyframe icons
- Form labels no longer have colons by default
- Node icons are now displayed in timeline
- Reorganized and sorted Load Images menu into categories
- Removed edit session dialog close button
- Added panel menu option to reset size

Preview options:
- Added preview options menu
- Added option to show/hide gizmos
- Added quick preview background color option
- Allow blueprint reference images in front of the model
- Added setting to toggle double click to select reference image
- Shift click in orbit gizmo to select middle,
- Set antialiasing bleeding fix setting to true by default

Exporting:
- Added STL exporter
- Added GIF exporter for images
- Before asking for save locations for multiple textures when saving, a pop-up now opens to confirm you want to save them
- Added git text normalization for JSON files

Animation:
- Added expanded Molang expression editor
- Added animation groups
- The animation list is now searchable
- Added setting to change default keyframe interpolation mode
- Bind to actor property on keyframes
- Allow locking animation as playing while selected
- Added support for shift and control modifiers when sliding keyframes with keyboard
- Move keyframes up and down in graph editor with arrow keys
- Added animation file save as context menu option
- Added channel filter action to timeline context menu
- Added quaternion interpolation mode (opt-in per timeline animator in generic models)

Texturing:
- Added darken/lighten blend modes
- Added Flipbook texture toggle in texture context menu
- Searchable texture list
- Add action to import image as layer
- Added normal map color picker
- Added setting to toggle automatically loading textures as flipbook
- Images with an aspect ratio of 1x2 are now no longer automatically loaded as flipbook textures
- Added standalone action to apply selected texture to selected elements

New elements:
- Added billboards
- Added splines
- Added armatures and armature bones
- The add element actions in the outliner toolbar have been combined into one Add Element action with a submenu

Minecraft:
- Added display settings support for the new shelf slot
- Added java display settings GUI slot clipping
- Added fallback for query.model_scale
- Added support for cem model field in jem format

Minecraft skin editor:
- Added skin menu
- Added waist bone for minecraft player skins
- Option to convert between slim and wide skin model
- Added custom skin pose saving
- Option to load skin textures from Minecraft vanilla samples pack

Themes customization:
- Added a new CSS-based .bbtheme file format (More info)
- Theme configuration options (Better organization for sets of themes #2657)
- Workflow improvements for theme creators
- Themes can now be edited in an external code editor using CSS syntax
- You can reload themes with the press of a button
- You can enable automatic reload to apply your changes instantly when you save them
- Separate CSS layer for themes, allowing full CSS control without using !important.

Miscellaneous changes:
- Added mesh smooth shading option
- Added Record Gizmos option to GIF Recorder
- Added setting for relative or absolute asset paths
- Allow specifying custom install location on Windows
- Added setting to disable autocomplete
- Added a keybind for adding a mesh to the blender bbkeymap
- Improved outdated client message when opening newer bbmodel
- Added confirmation dialog when loading palette to confirm replacing other palette
- Added button to open file in external program in the JSON error dialog
- Made stretch gizmo operate more granularly
- Added model identifier in collections
- Added legacy bbmodel export
- Improve automatic node name flipping to support R and L notation
- Improve Flip Animation tool to support more left/right name notations

Technical updates:
- Switched codebase to use modules and esbuild
- Introduced typescript
- Added new development workflow, scripts, and VSCode renderer debug integration (see readme.md on the "next" branch)
- Updated required browser version to ES2023
- Replaced compareVersions with new VersionUtil
- Renamed selectLow to markAsSelected on outliner nodes
- Implemented new element behavior system, allowing more hard-coded behavior of elements to be customized on custom element types
- Added full clone support for "object"-type properties
- Change how outliner hierarchy + groups are saved in undo history and bbmodel
- Mobile UI tweaks
- Support for separators in menu sidebars
- Added permission system for plugins using native APIs
- Added scoped file system
- Changed Group.selected to return array
- Added dialog onResize hook
- Plugin dependency order is now resolved on load
- Added collection contains API
- Added support for any data:image/ URL to getIconNode
- Added events loaded_plugin and unloaded_plugin
- Addsed delete functions to Menu and MenuBar classes to make them match their types
- Added new SystemInfo API to get common information about the system that the program is running on
- Added developer menu option to expose native APIS in dev tools
- Added block_size option in ModelFormat
- Made euler order configurable per format
- Support for property inputs in collections
- Changed collection save-over to no longer show file dialog
- Add category option to message box commands
- Added element behavior override system
- Added external data loader option to codec parse functions
- Changed third argument in codec load + parse methods
- Added property support on timeline animators
- Added animation loop wrapping as a format feature flag
- Ensure consistent mesh quad vertex order