Fix desktop file in Debian not showing icon

Packaging/debian/devilutionx.install

@@ -1,10 +1,4 @@
 Packaging/fedora/devilutionx.desktop usr/share/applications/
 obj-x86_64-linux-gnu/devilutionx     	usr/share/games/diablo/
-Packaging/resources/Diablo_48.png	usr/share/icons/hicolor/48x48/apps
-Packaging/resources/Diablo_32.png	usr/share/icons/hicolor/32x32/apps
-Packaging/resources/16.png		usr/share/icons/hicolor/16x16/apps
 Packaging/resources/CharisSILB.ttf	usr/share/fonts/truetype
-Packaging/resources/16.png 		usr/share/icons/hicolor/16x16/apps/
-Packaging/resources/Diablo_32.png 	usr/share/icons/hicolor/32x32/apps/
-Packaging/resources/Diablo_48.png 	usr/share/icons/hicolor/48x48/apps/
 

Packaging/debian/rules

@@ -26,6 +26,6 @@ override_dh_auto_install:
 	mkdir -p debian/devilutionx/usr/share/icons/hicolor/16x16/apps/
 	mkdir -p debian/devilutionx/usr/share/icons/hicolor/32x32/apps/
 	mkdir -p debian/devilutionx/usr/share/icons/hicolor/48x48/apps/
-	cp Packaging/resources/16.png debian/devilutionx/usr/share/icons/hicolor/16x16/apps/diablo.png 
-	cp Packaging/resources/Diablo_32.png debian/devilutionx/usr/share/icons/hicolor/32x32/apps/diablo.png 
-	cp Packaging/resources/Diablo_48.png debian/devilutionx/usr/share/icons/hicolor/48x48/apps/diablo.png 
+	cp Packaging/resources/16.png debian/devilutionx/usr/share/icons/hicolor/16x16/apps/devilutionx.png 
+	cp Packaging/resources/Diablo_32.png debian/devilutionx/usr/share/icons/hicolor/32x32/apps/devilutionx.png 
+	cp Packaging/resources/Diablo_48.png debian/devilutionx/usr/share/icons/hicolor/48x48/apps/devilutionx.png