Replace "Continue" with "ControlFlow"

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/620>

src/main.rs

@@ -10,7 +10,7 @@ use crate::data::loading;
 use crate::event_loop;
 use crate::panel;
 use crate::state;
-use glib::{Continue, MainContext, PRIORITY_DEFAULT, Receiver};
+use glib::{ControlFlow, MainContext, PRIORITY_DEFAULT, Receiver};
 
 
 mod c {
@@ -163,7 +163,7 @@ mod c {
                     hint_manager,
                     dbus_handler,
                 );
-                Continue(true)
+                ControlFlow::Continue
             },
         );
         #[cfg(not(feature = "glib_v0_14"))]

src/panel.rs

@@ -66,7 +66,7 @@ pub mod c {
         glib::idle_add_local(move || {
             let panel = panel.clone_ref();
             panel.borrow_mut().set_configured(Size{width, height});
-            glib::Continue(false)
+            glib::ControlFlow::Break
         });
     }
 }

src/popover.rs

@@ -376,6 +376,6 @@ pub fn show(
     menu.bind_model(Some(&model), Some("popup"));
     glib::idle_add_local(move || {
         menu.popup();
-        Continue(false)
+        glib::ControlFlow::Break
     });
 }