Remove format strings which are not longer needed from drop-down lists

`↑ Shift` + `Del`

All hotkeys for Mp3tag

General Select all	`Ctrl` + `A`
General Invert selection	`Ctrl` + `↑ Shift` + `A`
General Restore all input fields	`Ctrl` + `B`
General Copy tag or selected text	`Ctrl` + `C`
General Copy file	`Ctrl` + `↑ Shift` + `C`
General Change directory	`Ctrl` + `D`
General Upper directory	`Ctrl` + `↑ Shift` + `D`
General Remove file (without deleting it)	`Del`
General Delete file (to Windows Recycle Bin if globally activated)	`Ctrl` + `Del`
General Delete file (WARNING: the file will be removed from your hard-drive!)	`Ctrl` + `↑ Shift` + `Del`
General Export	`Ctrl` + `E`
General Export (with an export file for each different directory)	`Ctrl` + `↑ Shift` + `E`
General Favorite directory	`Ctrl` + `F`
General Add directory	`Ctrl` + `H`
General freedb ... / web source	`Ctrl` + `I`
General freedb ... / web source (Quick)	`Ctrl` + `↑ Shift` + `I`
General Auto-numbering wizard	`Ctrl` + `K`
General Auto-numbering wizard (with counter reset for each subfolder)	`Ctrl` + `↑ Shift` + `K`
General freedb (local) ...	`Ctrl` + `L`
General Select next file	`Ctrl` + `N`
General Options ...	`Ctrl` + `O`
General Playlist (all files)	`Ctrl` + `P`
General Playlist (all files) with one playlist for each subfolder	`Ctrl` + `↑ Shift` + `P`
General Show/hide tag input mask	`Ctrl` + `Q`
General Remove tag	`Ctrl` + `R`
General Save tag	`Ctrl` + `S`
General Read tag	`Ctrl` + `T`
General Play	`Ctrl` + `↑ Shift` + `T`
General Unselect all	`Ctrl` + `U`
General Paste tag or text	`Ctrl` + `V`
General Move file	`Ctrl` + `↑ Shift` + `V`
General Cut tag or selected text	`Ctrl` + `X`
General Undo	`Ctrl` + `Z`
General Rename file	`F2`
General Filter	`F3`
General Play selected file(s)	`F4`
General Forward in directory history	`Alt` + `→`
General Backward in directory history	`Alt` + `←`
General File properties	`Alt` + `⤶ Enter`
General Extended Tag dialog to edit extended and user defined tag fields as well as embedded cover art.	`Alt` + `T`
General Change order of files in list of files	`Alt` + `Mouse movement`
General Change order of files in list of files	`Alt` + `↓`
General Change order of files in list of files	`Alt` + `↑`
General Move selected files to end in list of files	`Alt` + `Page Down`
General Move selected files to beginning in list of files	`Alt` + `Page Up`
General Remove format strings which are not longer needed from drop-down lists	`↑ Shift` + `Del`
Convert Tag - Filename	`Alt` + `1`
Convert Filename - Tag	`Alt` + `2`
Convert Filename - Filename	`Alt` + `3`
Convert Text file - Tag	`Alt` + `4`
Convert Tag - Tag	`Alt` + `5`
Convert Actions	`Alt` + `6`
Convert Quick action	`Alt` + `↑ Shift` + `6`
Convert Tag - Filename (Preview)	`Alt` + `↑ Shift` + `1`
Convert Filename - Tag (Preview)	`Alt` + `↑ Shift` + `2`
Convert Filename - Filename (Preview)	`Alt` + `↑ Shift` + `3`
Useful helpers Displays format string helper menu (e.g., at converters or actions)	`Ctrl` + `Space`
Useful helpers Quick forward navigation between sub-windows (Tag Panel, Filter, File View)	`Ctrl` + `⭾ Tab`
Useful helpers Quick backward navigation between sub-windows (Tag Panel, Filter, File View)	`Ctrl` + `↑ Shift` + `⭾ Tab`
Useful helpers Automatically size the file view columns to match the content	`Ctrl` + `Num +`