Fixed #575 (Improvement of text palette)

[sarthak-g]

fixed issue #575

[llaske]

Hmmm. It look like it don't work when both Bold and Italic styles are selected.
See the video below:

Could be related to #563

[sarthak-g]

Yeah, it's because of #563
In video below, I printed whether box selected has text in italic or normal on first line and similarly bold or normal on second line.
When we come back to first page then only bold property is present.

[llaske]

Nice. Thanks.