Similar subtype

This PR introduces the possibility of filtering by subtype for the following elements:

* noteheads
* tremolo
* dynamics
* accidentals
I am using the string found in sym.cpp -> symUserNames. The code that set's the labels for the head note types can be found here https://github.com/musescore/MuseScore/blob/2e47e8a55cb925c6be175b05fe5cf3051c454e15/mscore/menus.cpp#L497.