refactor: move tags to react (#753)

* refactor: move Tags list to react

* refactor: extract TagsListItem and simplify hooks

* refactor: remove comment & dead code

* fix: mobx warnings & safari bug

* fix: text select on non-safari

* fix: remove unecessary comments

* style: apply prettier format

* style: apply formatting on tags_view

* refactor: remove the angular tags rendering

* feat: add back the "select previous tag" behavior

* style: simplify code and avoid important

* style: remove note on state

app/assets/stylesheets/_tags.scss

@@ -1,6 +1,8 @@
 .tags {
   width: 180px;
   flex-grow: 0;
+
+  user-select: none;
   -moz-user-select: none;
   -khtml-user-select: none;
   -webkit-user-select: none;
@@ -85,18 +87,25 @@
 
         // Required for Safari to avoid highlighting when dragging panel resizers
         // Make sure to undo if it's selected (for editing)
+        user-select: none;
+        -moz-user-select: none;
+        -khtml-user-select: none;
         -webkit-user-select: none;
 
+        pointer-events: none;
+
         &.editing {
-          -webkit-user-select: text !important;
+          pointer-events: auto;
+          user-select: text;
+          -moz-user-select: text;
+          -khtml-user-select: text;
+          -webkit-user-select: text;
         }
 
         &:focus {
           outline: 0;
           box-shadow: 0;
         }
-
-        pointer-events: none;
       }
 
       > .count {