Implement style mode in lyric editor.

[andy840119]

Because lyric will be able to have its own style, so should create style section.

what feature might be added in mode:

• should be able to assign style to lyric
• should be able to check which character is missing if use customized font.
• [optional] list all fonts that is using (maybe this will be listed in style editor also).
• should have button to check missing fonts (or will check in some place?)

[andy840119]

should be better to have style preview in tooltip, might be better with current lyric.

[andy840119]

小心臟快承受不住了

[andy840119]

wait.
the font does not include in lyric style.
so should create a config mode for selecting lyric config?