Avoid expensive build of tree when not using it

ProcessList.c

@@ -564,6 +564,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
       }
    }
 
+   if (this->settings->treeView) {
       // Clear out the hashtable to avoid any left-over processes from previous build
       //
       // The sorting algorithm relies on the fact that
@@ -572,3 +573,4 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
 
       ProcessList_buildTree(this);
    }
+}