client: prepared splitview Up to four panes can be used to display different components. Currently hardcoded to one pane with the map component. Two panes can be oriented vertically or horizontally and three panes can be set to left, right, top and bottom, which is the position of the one full-width or -height pane.

--- a/client/src/assets/application.scss	Tue Apr 09 16:42:58 2019 +0200
+++ b/client/src/assets/application.scss	Tue Apr 09 18:23:07 2019 +0200
@@ -209,3 +209,8 @@
   overflow: hidden;
   text-overflow: ellipsis;
 }
+
+.wh-100 {
+  width: 100% !important;
+  height: 100% !important;
+}