Mp3tag 2.81

What's new in this version:

- NEW: added support for iTunesspecific ID3v2 grouping tag field GRP1 as GROUPING
- NEW: added support for reading ID3v2.2 iTunes tag fields for classical music MOVEMENT, MOVEMENTTOTAL, MOVEMENTNAME
- FIX: automatic playlist creation used previous values after tag save
- NEW: added support for press and hold gesture on cover art window to trigger context menu on touch devices
- FIX: regression where URL ID3v2 fields (WWW*) were accidentally written as multivalue fields (since v2.80a)
- FIX: value overflow when calculating bitrate for large VBR MP3 files which resulted in negative bitrates
- LNG: added Corsican installer language and updated Czech and Turkish language files
- CHG: updated installer icons and graphics
- NEW: added portable installation mode that stores settings in application directory and doesn't write information to the registry
- NEW: installer now asks for UAC admin elevation in case if its run from a nonadmin user account
- CHG: changed installer and application to guess user language instead of asking user
- NEW: improved installer UI for highresolution screens with high DPI settings (DPI awareness)
- NEW: added version information to installer
- NEW: added size estimation to uninstaller
- NEW: added placeholders to access file path of current active playlist, i.e., playlist_filename%, %_playlist_filename_ext% and %_playlist_folderpath%
- FIX: renaming files via directediting in file list in %_filepath% column automatically removed trailing blanks
- FIX: improved ID3v2 specification compliance by adding terminating 0x00 for text strings
- FIX: randomizing a filtered file list by clicking on first column header resulted in resetting of list contents
- FIX: missing breadcrumb links in help topic for "Configuration > Tags > Mapping" and missing link from "Configuration > Tags"
- FIX: converter 'Tag Filename' treated paths that were built from field values containing slash characters as relative