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.

sandstorm.js

@@ -435,12 +435,12 @@ if (isSandstorm && Meteor.isClient) {
   //
   // XXX Hack. The home route is already defined at this point so we need to
   // add the redirection trigger to the internal route object.
-  FlowRouter._routesMap.home._triggersEnter.push((context, redirect) => {
-    redirect(FlowRouter.path('board', {
-      id: sandstormBoard._id,
-      slug: sandstormBoard.slug,
-    }));
-  });
+  //FlowRouter._routesMap.home._triggersEnter.push((context, redirect) => {
+  //  redirect(FlowRouter.path('board', {
+  //    id: sandstormBoard._id,
+  //    slug: sandstormBoard.slug,
+  //  }));
+  //});
 
   // XXX Hack. `Meteor.absoluteUrl` doesn't work in Sandstorm, since every
   // session has a different URL whereas Meteor computes absoluteUrl based on
@@ -457,9 +457,9 @@ if (isSandstorm && Meteor.isClient) {
   // XXX Hack to fix https://github.com/wefork/wekan/issues/27
   // Sandstorm Wekan instances only ever have a single board, so there is no need
   // to cache per-board subscriptions.
-  SubsManager.prototype.subscribe = function(...params) {
-    return Meteor.subscribe(...params);
-  };
+  //SubsManager.prototype.subscribe = function(...params) {
+  //  return Meteor.subscribe(...params);
+  //};
 }
 
 // We use this blaze helper in the UI to hide some templates that does not make