Updated French translation
Merge pull request #329 from virtualtam/master

Updated French translation
Fix potential crash on exit with multiple tabs opened
Fix javascript errors when try to evaluate undefined variables
Add "Inspect" action to context menu

* The "Inspect" action will bring up web inspector from WebKit.
* Restorable inspector window geometry.
Merge pull request #327 from timonwong/article_inspector

Add "Inspect" action to context menu
Fixed #333: Do not allow the floating elements to overflow to the other cards