dateMenu: Swap calendar and event columns

The new design has the events list on the left and the calendar on the
right, so swap them around and remove the vertical separator between
them in favor of some additional whitespace as in the mockups.

https://bugzilla.gnome.org/show_bug.cgi?id=744817

data/theme/gnome-shell.css

@@ -585,9 +585,16 @@ StScrollBar {
   #panel .screencast-indicator {
     color: #f57900; }
 
+#calendarArea {
+  padding: 0.75em 1.0em; }
+
 .calendar {
-  padding: .4em 1.75em .8em 1.75em;
-  margin-bottom: 2em; }
+  margin: 0 1.5em;
+  margin-bottom: 1em; }
+
+.datemenu-calendar-column {
+  spacing: 0.5em;
+  padding-bottom: 3em; }
 
 .datemenu-date-label {
   padding: .4em 1.7em;
@@ -596,11 +603,6 @@ StScrollBar {
   font-weight: bold;
   font-size: 110%; }
 
-.calendar-vertical-separator {
-  width: .3em;
-  -stipple-width: 1px;
-  -stipple-color: rgba(238, 238, 236, 0.2); }
-
 .calendar-month-label {
   color: #e2e2df;
   font-weight: bold;