JS frontend stuff

Move old ember frontend to properly named folder
Add vue based new frontend

frontend-reactive/app/styles/util.css

@@ -1,21 +0,0 @@
-.hide {
-  display: none;
-}
-
-/* Copied from: https://stackoverflow.com/a/4407335 */
-.noselect {
-  -webkit-touch-callout: none; /* iOS Safari */ /* Safari */ /* Konqueror HTML */ /* Old versions of Firefox */ /* Internet Explorer/Edge */
-  user-select: none; /* Non-prefixed version, currently
-                                  supported by Chrome, Edge, Opera and Firefox */
-}
-
-.separator-horizontal {
-  width: 100%;
-  border: 1px solid black;
-  margin-top: 0.2em;
-  margin-bottom: 0.2em;
-}
-
-.filling-spacer {
-  flex-grow: 1;
-}