Symbolize duration consistently

[Phaigo]

Pitch and duration are essential attributes of a note. Piano roll represents them visually (non-abstract), higher y position -> higher pitch, longer x length -> longer duration. Staff notation is half-abstract, higher y position -> higher pitch, different symbols -> duration. Integer notation symbolizes both. Pitch is obviously represented by numbers, but what about duration?

In staff notation, half notes and quarter notes differ in their notehead symbols, which are hidden by the plugin. To differentiate between them, the numbers on half notes are shown as italic as a workaround. Ideally, pitch and duration should correspond to different aspects of a symbol, and variations in duration should be represented consistently by variations of the symbol.

Staff notation is already somewhat consistent — each flag / beam halves the duration. There could be a similar design for doubling the duration, or extending the duration by half (replacing dots, which were invented historically for a weird reason). Getting rid of duration dots also makes each note-symbol self-contained, and prevents confusion if dots are used to indicate octaves in pitch.

In any case, this is beyond the plugin framework and requires forking MuseScore itself.

[Phaigo]

Just an idea - making stems additive

haven't decided on double dots (1.75 quarter note). if additive (1+0.5 one flag+0.25 two flags), it needs to be distinguished from (1+0.125 three flags). or could it be subtractive (2-0.25 quarter note), e.g. flags in the opposite direction? (of course, an alternative is to write it with ties instead)