Great idea @Indrek Puolokainen . We have now added a clear formatting button to the editor, it's live now so you should be able to test it out straight away.

Basically what it does is strip the formatting (bold, italic, underline, links etc) from any selected text. Sometimes when text is pasted into the editor HTML tags and classes are included, depending on where its pasted from, for those cases you should be able to use the 'normal' paragraph formatting option to return it to the basic text style (see gif below).

Yes it takes too much time right now.