Allow to modify shortcut toolbar and allow to add more shortcuts to it

Imported from UserVoice

Author: Chandrashekhar

The current version has only five shortcuts in the Shortcut toolbar (save, print, quick print, undu, redu). If anyone has some tools that are often required, adding essential tools to the shortcut toolbar is a very time-saving task for anyone.

Imported from UserVoice

Author: olivier thery