Add the following new Sandstorm features and fixes:

- All Boards page [so it's possible to go back from subtask board](https://github.com/wekan/wekan/issues/2082)
- Board favorites
- New Sandstorm board first user is Admin and [has IFTTT Rules](https://github.com/wekan/wekan/issues/2125)
  and Standalone Wekan Admin Panel. Probably some Admin Panel features do not work yet. Please keep backup of your grains before testig Admin Panel.
- Linked Cards and Linked Boards.
- Some not needed options like Logout etc have been hidden from top bar right menu.
- [Import board now works. "Board not found" is not problem anymore](https://github.com/wekan/wekan/issues/1430), because you can go to All Boards page to change to imported board.

and removes the following features:

- Remove Welcome Board from Standalone Wekan, [to fix Welcome board not translated](https://github.com/wekan/wekan/issues/1601).
  Sandstorm Wekan does not have Welcome Board.

Thanks to xet7 !

Closes #2125,
closes #2082,
closes #1430,
closes #1601,
related #2205,
related #2070,
related #1695,
related #1192.

client/components/cards/cardDetails.jade

@@ -19,16 +19,14 @@ template(name="cardDetails")
             a.js-parent-card(href=linkForCard) {{title}}
           // else
             {{_ 'top-level-card'}}
-        unless isSandstorm
-          if isLinkedCard
-            h3.linked-card-location
-              +viewer
-                | {{getBoardTitle}} > {{getTitle}}
+        if isLinkedCard
+          h3.linked-card-location
+            +viewer
+              | {{getBoardTitle}} > {{getTitle}}
 
     if getArchived
       if isLinkedBoard
-        unless isSandstorm
-          p.warning {{_ 'board-archived'}}
+        p.warning {{_ 'board-archived'}}
       else
         p.warning {{_ 'card-archived'}}
 
@@ -192,11 +190,9 @@ template(name="cardDetails")
     unless currentUser.isNoComments
       if isLoaded.get
         if isLinkedCard
-          unless isSandstorm
-            +activities(card=this mode="linkedcard")
+          +activities(card=this mode="linkedcard")
         else if isLinkedBoard
-          unless isSandstorm
-            +activities(card=this mode="linkedboard")
+          +activities(card=this mode="linkedboard")
         else
           +activities(card=this mode="card")