Fix file deletion

Author: CoBC

Client/qtTeamTalk/mainwindow.ui

@@ -435,6 +435,12 @@
            <property name="sortingEnabled" stdset="0">
             <bool>true</bool>
            </property>
+           <property name="selectionMode">
+            <enum>QAbstractItemView::ExtendedSelection</enum>
+           </property>
+           <property name="selectionBehavior">
+            <enum>QAbstractItemView::SelectRows</enum>
+           </property>
            <property name="tabKeyNavigation" stdset="0">
             <bool>false</bool>
            </property>