Selects in editor toolbar do not correctly update when switching back to a default state.

[byronm]

This seems to only apply when modifying a mid-string char; i.e., the 'b' in 'abc'.

1. Highlight 'b'
2. Select 'Serif'.
3. Select 'San Serif'.

The dropdown should read 'San Serif', but still reads 'Serif'. editor.getOps() indicates that the delta has been updated correctly though.

The same issue occurs with all other dropdowns when switching back to a default style; for example, when switching back to the "Normal" size or the "White" background color.

[jhchen]

No longer reproducible