improving mobile accesability

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

web/src/main/resources/web/css/default.css

@@ -359,4 +359,14 @@ table{
     border: 0 none;
     background: none;
     color: orange;
+}
+
+.boundary{
+    position: relative;
+}
+
+.boundary button.save{
+    position: absolute;
+    right: 0;
+    bottom: 0;
 }