Changing between highlight and underline annotations

[michalrentka]

Closes #985

[mvasilak]

• Tapping the "Convert to ..." cell, and this changing without actually changing the annotation seems unintuitive. Maybe a cell with 2 radio buttons instead? Or make it an action in the ... menu of the annotation instead of a cell, so it can be executed immediatelly.
• The colors for the highlight and the underline shouls be adopted for the annotation type. Converting an underline to a highlight results in a slightly darker color.
• Converting an annotation in the sidebar results in a jumpy animation and closes the reader.

[michalrentka]

• Tapping the "Convert to ..." cell, and this changing without actually changing the annotation seems unintuitive. Maybe a cell with 2 radio buttons instead? Or make it an action in the ... menu of the annotation instead of a cell, so it can be executed immediatelly.

Updated based on #zotero discussion, changed to UISegmentedControl as you suggested.

• The colors for the highlight and the underline shouls be adopted for the annotation type. Converting an underline to a highlight results in a slightly darker color.

I saw this before but I can't reproduce now. Anyway I do update the color of annotation when the type changes, so that shouldn't be the issue.

• Converting an annotation in the sidebar results in a jumpy animation and closes the reader.

Fixed.

Check 5218305

[mvasilak]

Can the cell change be made with a reconfigure instead of deletion and insertion, for a smoother animation?