wip: replace popover menu with custom implementation that allows non-label entries

examples/dock/dock_popover/imp.rs

@@ -0,0 +1,33 @@
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use gtk4::glib;
+use gtk4::subclass::prelude::*;
+use gtk4::{Box, Button, ListBox, Revealer};
+
+use crate::dock_object::DockObject;
+
+#[derive(Debug, Default)]
+pub struct DockPopover {
+    pub menu_handle: Rc<RefCell<Box>>,
+    pub all_windows_item_revealer: Rc<RefCell<Revealer>>,
+    pub window_list: Rc<RefCell<ListBox>>,
+    pub launch_new_item: Rc<RefCell<Button>>,
+    pub favorite_item: Rc<RefCell<Button>>,
+    pub quit_all_item: Rc<RefCell<Button>>,
+    //TODO figure out how to use lifetimes with glib::wrapper! macro
+    pub dock_object: Rc<RefCell<Option<DockObject>>>,
+}
+
+#[glib::object_subclass]
+impl ObjectSubclass for DockPopover {
+    const NAME: &'static str = "DockPopover";
+    type Type = super::DockPopover;
+    type ParentType = Box;
+}
+
+impl ObjectImpl for DockPopover {}
+
+impl WidgetImpl for DockPopover {}
+
+impl BoxImpl for DockPopover {}