edit/crop: Work around gesture bug

After clicking the "apply crop" button, the drag button to change the
selection is getting stuck. Adding manual claim for the click gesture
for the button early fixes this.

src/widgets/edit/crop_selection.rs

@@ -189,6 +189,8 @@ mod imp {
 
         #[template_child]
         apply_button: TemplateChild<gtk::Button>,
+        #[template_child]
+        apply_button_click: TemplateChild<gtk::GestureClick>,
 
         #[template_child]
         selection_move: TemplateChild<gtk::GestureDrag>,
@@ -281,6 +283,21 @@ mod imp {
             self.selection.set_cursor_from_name(Some("move"));
             self.apply_button.set_cursor_from_name(Some("default"));
 
+            // Gesture bug workaround
+            self.apply_button_click.connect_begin(move |gesture, _| {
+                gesture.set_state(gtk::EventSequenceState::Claimed);
+            });
+
+            self.apply_button_click.connect_released(glib::clone!(
+                #[weak]
+                obj,
+                move |_, _, x, y| {
+                    if obj.imp().apply_button.contains(x, y) {
+                        let _ = obj.activate_action("edit-crop.apply-crop", None);
+                    }
+                }
+            ));
+
             // Drag begin
             self.selection_move.connect_drag_begin(glib::clone!(
                 #[weak]

src/widgets/edit/crop_selection.ui

@@ -49,6 +49,9 @@
               <class name="osd" />
               <class name="apply-button" />
             </style>
+            <child>
+              <object class="GtkGestureClick" id="apply_button_click" />
+            </child>
           </object>
         </child>
         <property name="child">