Added own icon to desktop return thanks to @Dervart

Signed-off-by: Boris Yumankulov <boria138@altlinux.org>

usr/share/applications/portprotonqt_return.desktop

@@ -1,7 +1,7 @@
 [Desktop Entry]
 Name=Return to PortProtonQt
 Exec=portprotonqt-desktop-return
-Icon=steamdeck-gaming-return
+Icon=portprotonqt-gaming-return
 Terminal=false
 Type=Application
 StartupNotify=false

usr/share/icons/hicolor/scalable/actions/portprotonqt-gaming-return.svg

@@ -0,0 +1 @@
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usr/share/icons/hicolor/scalable/actions/steamdeck-gaming-return.svg

@@ -1,7 +0,0 @@
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