feat: add autocompletion for TAGS inside :PROPERTIES:

Resolved #757

src/main/frontend/components/block.cljs

@@ -2241,24 +2241,3 @@
                (when alias? [:span.text-sm.font-medium.opacity-50 " Alias"])]
               (blocks-container blocks config))])))]
      (blocks-container blocks config))])
-
-(comment
-  ;; timestamps
-  ;; [2020-02-10 Mon 13:22]
-  ;; repetition
-  (def r1 "<2005-10-01 Sat +1m>")
-  ;; TODO: mldoc add supports
-  (def r2 "<2005-10-01 Sat +1m -3d>")
-
-  (def l
-    "1. First item
-hello world
-2. Second item
-nice
-3. Third item")
-
-  (def t
-    "| Name  | Phone | Age |
-|-------+-------+-----|
-| Peter |  1234 |  17 |
-| Anna  |  4321 |  25 |"))

src/main/frontend/format/block.cljs

@@ -171,13 +171,16 @@
   (let [properties (into {} properties)
         page-refs (->>
                    (map (fn [v]
-                          (when v
-                            (->> (re-seq text/page-ref-re v)
-                                 (map second)
-                                 (map string/lower-case))))
+                          (when (string? v)
+                            (let [page-refs (->> (re-seq text/page-ref-re v)
+                                                 (map second))
+                                  tags (->> (string/split v #",")
+                                            (filter (fn [s] (= \# (first s))))
+                                            (map (fn [s] (subs s 1))))]
+                              (concat page-refs tags))))
                         (vals properties))
                    (apply concat)
-                   (distinct))
+                   (remove string/blank?))
         properties (->> properties
                         (medley/map-kv (fn [k v]
                                          (let [v (string/trim v)