Add DESKTOP_APPGROUPS_SELECTED to stable XFCE desktop target

Add browsers and programming app groups to the Ubuntu stable XFCE desktop build for fast HDMI boards, matching the configuration used in nightly and community XFCE targets.

Signed-off-by: Igor Pecovnik <igor@armbian.com>

Author: igorpecovnik

scripts/generate_targets.py

@@ -652,6 +652,7 @@ def generate_stable_yaml(conf_wip_boards, manual_content=""):
       BUILD_DESKTOP: "yes"
       DESKTOP_ENVIRONMENT: "xfce"
       DESKTOP_ENVIRONMENT_CONFIG_NAME: "config_base"
+      DESKTOP_APPGROUPS_SELECTED: "browsers,programming"
     items:
       - *stable-current-fast-hdmi
 """