Cannot apply changes in text formatting

[FireFragment]

When configuring the widget, just a change in formatting (Bold and Italic) isn't applicable, because the Apply button is greyed out. Some other change in widget configuration has to be made too to make applying it possible.

Steps to reproduce

1. Right-click on the widget
2. Click Configure ClearClock
3. Click on one of the B (bold) or I (italic) buttons, to toggle them
4. See, that the Apply button is still greyed out