- remove usage of historian & dependency

- update dependency to [re-frame "0.1.8"]
- use new register-pure-handler in all steps
NOTE: functional but daypart unit tests failing + history not yet working

src/re_frame/undo.cljs

@@ -23,7 +23,7 @@
 (defn clear-history!
   []
   (reset! undo-list [])
-  (reset! undo-list []))
+  (reset! redo-list []))
 
 
 (defn store-now!
@@ -34,22 +34,30 @@
                            @max-undos
                            (conj @undo-list @app-db)))))
 
+(defn- undos?
+  [v]
+  (> (count v) 1))
+
+(defn- redos?
+  [v]
+  (> (count v) 0))
+
 
 ;; -- subscriptions  -----------------------------------------------------------------------------
 
 (subs/register
   :undos?
   (fn handler
-    ; "return true is anything is stored in the undo list, otherwise false"
+    ; "return true if anything is stored in the undo list, otherwise false"
     [_ _]
-    (reaction (> (count @undo-list) 1))))
+    (reaction (undos? @undo-list))))
 
 (subs/register
   :redos?
   (fn handler
-    ; "return true is anything is stored in the redo list, otherwise false"
+    ; "return true if anything is stored in the redo list, otherwise false"
     [_ _]
-    (reaction (> (count @redo-list) 0))))
+    (reaction (redos? @redo-list))))
 
 
 ;; -- event handlers  ----------------------------------------------------------------------------