Just a small suggestion:
At the moment, if nothing is selected it clears the clipboard if you press Ctrl+C. Most other desktop apps don't do this.
If you copy and paste a lot, occasionally you accidently press Ctrl+C when you want Ctrl+V because C and V are next to each other. Normally it's not an issue because you just attempt to press Ctrl+V again but with Webuilder you need to go back and reselect the text again as it clears the clipboard.
Regards,
Peter.