Add a button to move selected cards

This is an alternative to drag and drop to move a set of selected
cards. This feature was available at the list level until I deleted it
in 5bdf91b, so it makes sense to add it back at the multi-selection
level.

client/components/sidebar/sidebarFilters.jade

@@ -67,6 +67,9 @@ template(name="multiselectionSidebar")
             else if someSelectedElementHave 'member' _id
               i.fa.fa-ellipsis-h
   hr
+  a.sidebar-btn.js-move-selection
+    i.fa.fa-share
+    span {{_ 'move-selection'}}
   a.sidebar-btn.js-archive-selection
     i.fa.fa-archive
     span {{_ 'archive-selection'}}
@@ -80,3 +83,7 @@ template(name="disambiguateMultiMemberPopup")
   p {{_ 'what-to-do'}}
   button.wide.js-unassign-member {{_ 'unassign-member'}}
   button.wide.js-assign-member {{_ 'assign-member'}}
+
+template(name="moveSelectionPopup")
+  +boardLists
+

client/components/sidebar/sidebarFilters.js

@@ -93,6 +93,7 @@ BlazeComponent.extendComponent({
           return popup.call(this.currentData(), evt);
         }
       },
+      'click .js-move-selection': Popup.open('moveSelection'),
       'click .js-archive-selection'() {
         mutateSelectedCards('archive');
         EscapeActions.executeUpTo('multiselection');
@@ -122,3 +123,10 @@ Template.disambiguateMultiMemberPopup.events({
     Popup.close();
   },
 });
+
+Template.moveSelectionPopup.events({
+  'click .js-select-list'() {
+    mutateSelectedCards('move', this._id);
+    EscapeActions.executeUpTo('multiselection');
+  },
+});