add sorting topics view

sass/style.scss

@@ -366,3 +366,18 @@ input[type="text"], input[type="password"], textarea, select {
   grid-area: topic-locked-container;
   border: 2px outset $light;
 }
+
+
+.draggable-topic {
+  cursor: pointer;
+  user-select: none;
+  background-color: $accent_color;
+  padding: 20px;
+  margin: 12px 0;
+  border-top: 6px outset $light;
+  border-bottom: 6px outset $dark2;
+  
+  &.dragged {
+    background-color: $button_color;
+  }
+}