RichTextEditor: inherit QApplication's stylesheet in RichTextHtmlEdit.
RichTextEditor: inherit QApplication's stylesheet in RichTextHtmlEdit.

We do this for other QTextDocuments, so we should do it here as well.

SuperNascher/mumble,SuperNascher/mumble,LuAPi/mumble,SuperNascher/mumble,unascribed/mumble,Lartza/mumble,unascribed/mumble,austinliou/mumble,LuAPi/mumble,unascribed/mumble,unascribed/mumble,austinliou/mumble,unascribed/mumble,LuAPi/mumble,LuAPi/mumble,unascribed/mumble,SuperNascher/mumble,Lartza/mumble,SuperNascher/mumble,Lartza/mumble,unascribed/mumble,austinliou/mumble,LuAPi/mumble,austinliou/mumble,Lartza/mumble,SuperNascher/mumble,unascribed/mumble,LuAPi/mumble,SuperNascher/mumble,SuperNascher/mumble,LuAPi/mumble,austinliou/mumble,LuAPi/mumble,Lartza/mumble,Lartza/mumble,austinliou/mumble,austinliou/mumble,LuAPi/mumble,Lartza/mumble,SuperNascher/mumble,austinliou/mumble,Lartza/mumble