Revert "Remove unused state"

This reverts commit 8419afe007.

src/main/frontend/components/block.cljs

@@ -2966,6 +2966,11 @@
         selected? (when-not (:slide? config)
                     (state/sub-block-selected? uuid))
         children (:block/_parent block)]
+    (cond
+      (= (:ui/deleting-block @state/state) (:block/uuid block))
+      nil
+
+      :else
       [:div.ls-block
        (cond->
         {:blockid (str uuid)
@@ -3054,7 +3059,7 @@
                            (dissoc :original-block))]
            (block-children config' block children' collapsed?)))
 
-     (when-not in-whiteboard? (dnd-separator-wrapper block children block-id slide? false false))]))
+       (when-not in-whiteboard? (dnd-separator-wrapper block children block-id slide? false false))])))
 
 (defn- block-changed?
   [old-block new-block]

src/main/frontend/handler/editor.cljs

@@ -692,6 +692,7 @@
         block (db/pull repo '[*] [:block/uuid uuid])]
     (when block
       (let [blocks (block-handler/get-top-level-blocks [block])]
+        (state/set-state! :ui/deleting-block uuid)
         (ui-outliner-tx/transact!
          {:outliner-op :delete-blocks}
          (outliner-core/delete-blocks! repo (db/get-db false)

src/main/frontend/modules/outliner/pipeline.cljs

@@ -88,6 +88,13 @@
     (when (= (:outliner-op tx-meta) :rename-page)
       (state/pub-event! [:page/renamed repo (:data tx-meta)]))
 
+    (when-let [deleting-block-id (:ui/deleting-block @state/state)]
+      (when (some (fn [datom] (and
+                               (= :block/uuid (:a datom))
+                               (= (:v datom) deleting-block-id)
+                               (true? (:added datom)))) tx-data) ; editing-block was added back (could be undo or from remote sync)
+        (state/set-state! :ui/deleting-block nil)))
+
     (when request-id
       (when-let [deferred (ldb/get-deferred-response request-id)]
         (p/resolve! deferred {:tx-meta tx-meta