fix(scss): Change month-view header text-overflow to ellipsis

fixes mattlewis92#59

Author: gordon-to

scss/month-view.scss

@@ -2,6 +2,7 @@
   .cal-header {
     text-align: center;
     font-weight: bolder;
+    white-space: nowrap;
   }
 
   .cal-cell-row:hover {
@@ -10,6 +11,10 @@
 
   .cal-header .cal-cell {
     padding: 5px 0;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    display: block;
+    white-space: nowrap;
   }
 
   .cal-cell-row .cal-cell:hover,