move all static assets into a single folder

src/css/metadataeditor.css

@@ -1,79 +0,0 @@
-.editPageSidebar {
-    display: block
-}
-
-.editPageSidebar-withcontent {
-    display: none
-}
-
-.libraryTree {
-    margin-left: .25em
-}
-
-.offlineEditorNode {
-    color: #c33
-}
-
-.editorNode img {
-    height: 18px;
-    margin: 0 .35em;
-    vertical-align: middle;
-    position: relative;
-    top: -2px
-}
-
-.jstree-anchor {
-    font-weight: 400 !important
-}
-
-.jstree-wholerow-hovered {
-    background: #38c !important;
-    -webkit-border-radius: 0 !important;
-    border-radius: 0 !important;
-    -webkit-box-shadow: none !important;
-    box-shadow: none !important
-}
-
-.jstree-default .jstree-hovered {
-    background: 0 0 !important;
-    -webkit-border-radius: 0 !important;
-    border-radius: 0 !important;
-    -webkit-box-shadow: none !important;
-    box-shadow: none !important;
-    color: #fff !important
-}
-
-.jstree-default .jstree-wholerow-clicked {
-    background: #00a4dc !important
-}
-
-.metadataSidebarIcon {
-    margin-right: .4em
-}
-
-@media all and (min-width:50em) {
-    .editPageSidebar {
-        position: fixed;
-        top: 5.2em;
-        bottom: 0;
-        left: 0;
-        width: 30%;
-        border-right: 1px solid #555;
-        display: block
-    }
-
-    .editPageInnerContent {
-        float: right;
-        width: 68.5%
-    }
-}
-
-@media all and (min-width:112.5em) {
-    .editPageSidebar {
-        width: 25%
-    }
-
-    .editPageInnerContent {
-        width: 73.5%
-    }
-}