Implement drag and drop reordering in current queue

src/sass/app.sass

@@ -322,3 +322,44 @@
         font-weight: normal
         display: inline
         padding-right: 0.375rem
+
+.song-listing-table
+  tr.is-playing
+    background-color: $table-row-active-background-color
+    color: $table-row-active-color
+
+    a, strong, td.song-duration, td.sort-handle span
+       color: currentColor
+
+    span.button, div.dropdown
+      color: $table-color
+
+  td
+    &.is-narrow
+      white-space: nowrap
+
+    &.song-duration
+      text-align: right
+
+    &.sortable-handle
+      -webkit-touch-callout: none
+      user-select: none
+
+  tbody .song-duration
+    color: $grey-light
+
+  tr:hover
+    .button
+
+// drag'n'drop
+.sortable-handle
+  span
+    cursor: grabbing
+    user-select: none
+
+tr.sortable-is-moving.is-playing
+  background-color: $table-row-active-background-color
+  color: $table-row-active-color
+
+  a, strong, td.song-duration, td.sort-handle span
+    color: currentColor