Keep the same selection for some actions

Refer: https://github.com/musescore/MuseScore/pull/2704
Affects 2.0.3 and master.

1. select range
2. do action

Result: Sometimes, the range is incomplete (missing elements that should be selected).
Expected: Either the same range is selected (as if selecting a measure) or the selection is lost.

e.g.
2. up arrow

Result: the selection turns into a list selection, accidentals not selected.
Expected: the selection should be a range selection, accidentals should be selected.

This also affects:

• enharmonic change ("J")
• double-clicking from lines, accidentals, tremolo, and beam properties palette
• Add > Lines > Slur, Crescendo, Decrescendo, and Note Anchored Line
• and others (?)

The selection should be as if a measure was selected.