Make Toggle System Break shortcut available when note or measure selected
This was first brought up in this thread: https://musescore.org/en/node/232596
Currently you must stop typing (or use accessibility options) and select a barline to enter a linebreak while enter a score. It would be more intuitive if pressing enter inserted a line break in the measure where the note is selected. Logically the input cursor would move to the first beat of the following measure. This would make entering a score more like a word processor when using the keyboard, or even other input methods that allow for keyboard input.
MuseScore currently acts mostly like a word processor for music. When the make number of notes that can be entered on a line is met, a "soft" return is entered and the current measure is moved to the following line (or page if necessary). One effect of allowing this would be, for example, if the measure consists of a 1/16th note on the first beat, the current measure is automatically filled with the appropriate rests. Pressing enter at this point, would of course leave those rests in that measure and the cursor would go to the next measure on the next line.
Allowing for a selected measure having the shortcut applied would make it work like the palette entry currently does.