use custom .desktop file for snap

snap/blue-recorder.desktop

@@ -0,0 +1,15 @@
+[Desktop Entry]
+Name=Blue Recorder
+Name[ar]=المسجّل الأزرق
+GenericName=Blue Recorder
+GenericName[ar]=المسجّل الأزرق
+Comment=Record your desktop easily using a simple GUI
+Comment[ar]=سجّل سطح مكتبك باستخدام واجهة رسومية سهلة
+Comment[fr]=Enregistrez votre bureau facilement avec une interface simple
+Comment[ru]=Записывайте ваш рабочий стол легко, используя простой интерфейс
+Exec=blue-recorder
+Terminal=false
+Type=Application
+Icon=${SNAP}/meta/gui/blue-recorder.png
+Categories=GTK;AudioVideo;
+StartupNotify=false

snap/snapcraft.yaml

@@ -34,7 +34,7 @@ parts:
 apps:
   blue-recorder:
     command: blue-recorder
-    desktop: data/blue-recorder.desktop
+    desktop: snap/blue-recorder.desktop
     extensions:
       - gnome-3-28
     plugs:
@@ -51,4 +51,4 @@ slots:
   dbus-daemon:
     interface: dbus
     bus: session
-    name: sa.sy.blue-recorder
+    name: sa.sy.blue-recorder