Merge pull request #1 from rstudio/master

Syncing my fork...
Add the "Clear Recent Projects" menu item to the popup
Changed the menu label such that it is more relevant for the projects popup menu
Added the callback to actually clear the recent projects from the popup menu
Shift the "Close Project" menu item to the near the top so the bottom of the popup is not so cluttered...
Change the label of the clear projects menu item to be shorter
Just another small editorial tweak
Merge pull request #152 from justacec/justacec/RemoveProjectsFromMenu

Justacec/remove projects from menu