- Updated the 'Welcome Page': removed the 'Open workspace' button and instead added 'New workspace' button
- Updated the 'Welcome Page': rearrganed the buttons
- PHP: the workspace file is now suffixed as '.workspace' and not '.phpwsp'. The file is stil supported, upon save codelite will change it to .workspace
  this is needed in order to provide a unified 'Open workspac' dialog for all workspace types
Welcome Page: added tooltips to the various buttons
Outline plugin: when saving a PHP editor, refersh the tree view