Set the process tree to overflow on its own so the remaining panel co…

…ntents with remain static.

src/app/pages/processes/processes.html

@@ -37,7 +37,7 @@
                     <button type="button" class="btn btn-primary btn-icon" ng-click="vm.getProcesses(true)"><i class="ion-loop"></i></button>
                 </div>
             </div>
-            <div js-tree="vm.treeConfig" ng-model="vm.treeProcesses"></div>
+            <div js-tree="vm.treeConfig" ng-model="vm.treeProcesses" class="pre-scrollable"></div>
         </div>
     </div>
 </div>