Remove "new-window" functionality

I were never able to get setifactionary results with this because:
* In GTK apps new window is created from the same process
* OpenGL is single-threaded so performance per window is halfed
* GTK4 has problems with rendeing using multiple contexts resulting in some frames being upside down

So for the time being I am removing a non-working option. There is a chance
that it will be fixed and added in future, but for now lets not
advertise a functionality that does not work.

clapper_src/app.js

@@ -43,13 +43,22 @@ class ClapperApp extends AppBase
         super.vfunc_open(files, hint);
 
         this.playlist = files;
+
+        if(!this.doneFirstActivate)
             this._handleAppStart();
+        else
+            this.setWindowPlaylist(this.active_window);
     }
 
     _onWindowShow(window)
     {
         super._onWindowShow(window);
 
+        this.setWindowPlaylist(window);
+    }
+
+    setWindowPlaylist(window)
+    {
         if(!this.playlist.length)
             return;
 

clapper_src/appBase.js

@@ -62,7 +62,7 @@ class ClapperAppBase extends Gtk.Application
     _handleAppStart()
     {
         if(this.doneFirstActivate)
-            return this._onWindowShow(this.active_window);
+            return;
 
         this._onFirstActivate();
         this.active_window.present();
@@ -82,15 +82,11 @@ class ClapperAppBase extends Gtk.Application
         this.windowShowSignal = this.active_window.connect(
             'show', this._onWindowShow.bind(this)
         );
-
         this.doneFirstActivate = true;
     }
 
     _onWindowShow(window)
     {
-        if(!this.windowShowSignal)
-            return;
-
         window.disconnect(this.windowShowSignal);
         this.windowShowSignal = null;
     }

clapper_src/player.js

@@ -95,7 +95,7 @@ class ClapperPlayer extends PlayerBase
         }
 
         if(!file.query_exists(null)) {
-            debug(`file does not exist: ${source}`, 'LEVEL_WARNING');
+            debug(`file does not exist: ${file.get_path()}`, 'LEVEL_WARNING');
             this._trackId++;
 
             if(this._playlist.length <= this._trackId)

data/com.github.rafostar.Clapper.desktop

@@ -10,8 +10,3 @@ Terminal=false
 Type=Application
 # Translators: Search terms to find this application. Do NOT translate the semicolons!
 Keywords=Video;Movie;Film;Clip;Series;Player;Playlist;DVD;TV;Disc;Album;Music;GNOME;Clapper;
-Actions=new-window;
-
-[Desktop Action new-window]
-Name=New Window
-Exec=com.github.rafostar.Clapper --new-window