Create New Style Command Button (#3394)
    
    * Create New Style Command Button

    

    This PR creates a new button in the pallette editor that creates a new style.  Button is large and easy access for a faster and easier workflow.  Original code developed by Turtletooth for Tahoma.  Given permission to develop within Openoonz.

    

    Co-Authored-By: Jeremy Bullock <turtletooth@users.noreply.github.com>
</turtletooth@users.noreply.github.com>
    

    * Update paletteviewergui.cpp

    

    Made changes to the PR per request by Shun.

    

    * Fixed a space within the code that wasn't suppose to be there.

    

    Co-authored-by: Jeremy Bullock <turtletooth@users.noreply.github.com></turtletooth@users.noreply.github.com>