Implement in-app notifications as App wide actions.

At first I tried creating custom InAppNotifications and send
them to the main loop to be added. That does not work sicne gtk
widgets are not thread safe. For now we can try having Action messages
that create them on demand. As oppose to create first then pass them.

hammond-gtk/src/widgets/mod.rs

@@ -3,3 +3,4 @@ mod episode;
 
 pub use self::episode::EpisodeWidget;
 pub use self::show::ShowWidget;
+pub use self::show::mark_all_watched;

hammond-gtk/src/widgets/show.rs

@@ -1,6 +1,6 @@
 use dissolve;
 use failure::Error;
-use glib;
+// use glib;
 use gtk;
 use gtk::prelude::*;
 use open;
@@ -10,7 +10,6 @@ use hammond_data::dbqueries;
 use hammond_data::utils::{delete_show, replace_extra_spaces};
 
 use app::Action;
-use appnotif::InAppNotification;
 use utils::get_pixbuf_from_path;
 use widgets::episode::episodes_listbox;
 
@@ -165,19 +164,10 @@ fn on_played_button_clicked(pd: Arc<Podcast>, episodes: &gtk::Frame, sender: Sen
         warn!("RUN WHILE YOU STILL CAN!");
     }
 
-    let text = "All episodes where marked as watched.";
-
-    // Set up the callback
-    let callback = clone!(sender => move || {
-        if let Err(err) = wrap(&pd, sender.clone()) {
-            error!("Something went horribly wrong with the notif callback: {}", err);
-        }
-        glib::Continue(false)
-    });
-    let _notif = InAppNotification::new(text, callback, sender);
+    sender.send(Action::MarkAllPlayerNotification(pd)).unwrap();
 }
 
-fn wrap(pd: &Podcast, sender: Sender<Action>) -> Result<(), Error> {
+pub fn mark_all_watched(pd: &Podcast, sender: Sender<Action>) -> Result<(), Error> {
     dbqueries::update_none_to_played_now(pd)?;
     sender.send(Action::RefreshWidgetIfVis)?;
     sender.send(Action::RefreshEpisodesView)?;