Fixed bug #722: Now is easier to close the lightbox

app/coffee/modules/common/lightboxes.coffee

@@ -31,6 +31,11 @@ class LightboxService extends taiga.Service
             lightbox.addClass('open')
         ), 70
 
+        lightbox.on 'click', (e) =>
+            target = angular.element(e.target)
+            if target[0] == lightbox[0]
+                @close(lightbox)
+
         $(document)
             .on 'keydown.lightbox', (e) =>
                 code = if e.keyCode then e.keyCode else e.which