Do not project more than one message

CHANGELOG

@@ -31,7 +31,7 @@ Core:
 - Added template hook system for plugins.
 - Made a lot of code clean up, improvements and bug fixes in client and
   backend.
-- Use CKEditor for editin projector messages.
+- Use CKEditor for editing projector messages.
 
 Motions:
 - Added adjustable line numbering mode (outside, inside, none) for each

openslides/core/static/js/core/base.js

@@ -778,6 +778,13 @@ angular.module('OpenSlidesApp.core', [
                     });
                     // if it was the same projector before, just delete it but not show again
                     if (_.indexOf(isProjectedIds, projectorId) == -1) {
+                        // Now check whether other messages are already projected and delete them
+                        var elements = Projector.get(projectorId).elements;
+                        _.forEach(elements, function (element, uuid) {
+                            if (element.name === name) {
+                                $http.post('/rest/core/projector/' + projectorId + '/deactivate_elements/', [uuid]);
+                            }
+                        });
                         return $http.post(
                             '/rest/core/projector/' + projectorId + '/activate_elements/',
                             [{name: name, id: self.id, stable: true}]

openslides/core/static/templates/core/projector-controls.html

@@ -61,7 +61,7 @@
             </a>
           </div>
 
-          <div class="btn-group" ng-show="projectors.length > 1">
+          <div class="btn-group nobr" ng-show="projectors.length > 1">
             <button class="btn btn-sm" ng-class="broadcast == active_projector.id ? 'btn-primary' : 'btn-default'"
               ng-click="active_projector.toggleBroadcast()" ng-disabled="broadcast > 0 && broadcast != active_projector.id">
               <i class="fa" ng-class="broadcast == active_projector.id ? 'fa-star' : 'fa-star-o'"></i>