- use util method already used in regular theme selector screen - theme_common is already in hidden category, no need to exclude it - searching on theme category rather than `theme%` name - move the uninstallable check in the util, no reason to show those in the regular theme selector screen either Fixes #92125 closes odoo/odoo#99099 Related: odoo/design-themes#586 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>