[fixed] add minHeight for week view overflow

fixes jquense#35

Author: jquense

src/less/time-grid.less

@@ -19,6 +19,7 @@
   flex: 1;
   width: 100%;
   border: 1px solid @calendar-border;
+  min-height: 0;
 
   .rbc-time-gutter {
     white-space: nowrap;