[displaymanager] if gnome is present, budgie should be detected first

src/modules/displaymanager/main.py

@@ -31,6 +31,8 @@ DesktopEnvironment = collections.namedtuple('DesktopEnvironment', ['executable',
 desktop_environments = [
     DesktopEnvironment('/usr/bin/startkde', 'plasma'),  # KDE Plasma 5
     DesktopEnvironment('/usr/bin/startkde', 'kde-plasma'),  # KDE Plasma 4
+    DesktopEnvironment('/usr/bin/budgie-desktop', 'budgie-desktop'), # Budgie v10.x
+    DesktopEnvironment('/usr/bin/budgie-session', 'budgie-desktop'), # Budgie v8.x
     DesktopEnvironment('/usr/bin/gnome-session', 'gnome'),
     DesktopEnvironment('/usr/bin/startxfce4', 'xfce'),
     DesktopEnvironment('/usr/bin/cinnamon-session-cinnamon', 'cinnamon'),
@@ -41,8 +43,6 @@ desktop_environments = [
     DesktopEnvironment('/usr/bin/lxqt-session', 'lxqt'),
     DesktopEnvironment('/usr/bin/pekwm', 'pekwm'),
     DesktopEnvironment('/usr/bin/pantheon-session', 'pantheon'),
-    DesktopEnvironment('/usr/bin/budgie-session', 'budgie-session'),
-    DesktopEnvironment('/usr/bin/budgie-desktop', 'budgie-desktop'),
     DesktopEnvironment('/usr/bin/i3', 'i3'),
     DesktopEnvironment('/usr/bin/openbox-session', 'openbox')
 ]