Note input productivity improvement

Your idea

Add a make current note longer option (when we are in note input mode).
This option could drastically improve productivity when entering notes with the computer keyboard.

Let's assume :

• 8th note is selected
• normal note input mode is selected
• the shortcut l (small L, for "make note Longer") is assigned to this function

In this configuration, typing "l" would lengthen the current note by one 8th

if 16th note is selected, then typing "l" would lenghten by a 16th note :

Problem to be solved

Note input on the keyboard is not very efficient.

Start by locating the note input mode and keyboard shortcut handling for MuseScore's desktop application. Verify how the selected note value is represented and how changing a note's duration is currently performed; done means the proposed shortcut lengthens the current note by the selected note value in normal note input mode.