hide user import/export buttons until we know the use case

maybe people can just script using the REST API

dashboard/src/views/users.html

@@ -448,7 +448,8 @@
       <input type="text" id="userSearchInput" class="form-control" style="max-width: 350px;" ng-model="userSearchString" ng-model-options="{ debounce: 1000 }" ng-change="updateFilter()" placeholder="{{ 'main.searchPlaceholder' | tr }}"/>
       <multiselect ng-model="userStateFilter" ms-header="{{ 'apps.stateFilterHeader' | tr }}" ms-selected="{{ userStateFilter }}" options="state.label for state in userStates" data-multiple="false"></multiselect>
       <div style="flex-grow: 1;"></div>
-      <div class="btn-group">
+      <!-- import/export buttons are hidden until we figure what the exact use case is -->
+      <div class="btn-group" ng-hide="true">
         <button class="btn btn-default" ng-click="userImport.show()" uib-tooltip="{{ 'users.userImport.tooltip' | tr }}" tooltip-append-to-body="true"><i class="fas fa-download"></i></button>
         <div class="btn-group" role="group">
           <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown" uib-tooltip="{{ 'users.userExport.tooltip' | tr }}" tooltip-append-to-body="true">