po: Update POTFİLES.in

## add missing files
- data/ui/repo_row.blp
- gradience/backend/flatpak_overrides.py
## remove unused files
- gradience/frontend/dialogs/log_out_dialog.py
- gradience/frontend/widgets/builtin_preset_row.py
- gradience/frontend/widgets/custom_css_group.py
- gradience/frontend/widgets/error_list_row.py
- gradience/frontend/widgets/palette_shades.py

## Chore
- order entries alphabetically.

po/POTFILES

@@ -6,14 +6,15 @@ data/ui/builtin_preset_row.blp
 data/ui/custom_css_group.blp
 data/ui/explore_preset_row.blp
 data/ui/help_overlay.blp
-data/ui/monet_theming_group.blp
 data/ui/log_out_dialog.blp
+data/ui/monet_theming_group.blp
 data/ui/no_plugin_window.blp
 data/ui/option_row.blp
 data/ui/plugin_row.blp
 data/ui/preferences_window.blp
 data/ui/preset_row.blp
 data/ui/presets_manager_window.blp
+data/ui/repo_row.blp
 data/ui/reset_preset_group.blp
 data/ui/save_dialog.blp
 data/ui/share_window.blp
@@ -22,30 +23,23 @@ data/ui/shell_theming_group.blp
 data/ui/theming_empty_group.blp
 data/ui/welcome_window.blp
 data/ui/window.blp
-gradience/frontend/schemas/preset_schema.py
-gradience/frontend/schemas/shell_schema.py
+gradience/backend/flatpak_overrides.py
 gradience/frontend/dialogs/app_type_dialog.py
-gradience/frontend/dialogs/log_out_dialog.py
 gradience/frontend/dialogs/save_dialog.py
 gradience/frontend/dialogs/unsupported_shell_dialog.py
-gradience/frontend/widgets/builtin_preset_row.py
-gradience/frontend/widgets/custom_css_group.py
-gradience/frontend/widgets/error_list_row.py
+gradience/frontend/main.py
+gradience/frontend/schemas/preset_schema.py
+gradience/frontend/schemas/shell_schema.py
+gradience/frontend/views/about_window.py
+gradience/frontend/views/main_window.py
+gradience/frontend/views/plugins_list.py
+gradience/frontend/views/presets_manager_window.py
+gradience/frontend/views/welcome_window.py
 gradience/frontend/widgets/explore_preset_row.py
 gradience/frontend/widgets/monet_theming_group.py
 gradience/frontend/widgets/option_row.py
-gradience/frontend/widgets/palette_shades.py
 gradience/frontend/widgets/plugin_row.py
 gradience/frontend/widgets/preset_row.py
 gradience/frontend/widgets/repo_row.py
 gradience/frontend/widgets/reset_preset_group.py
 gradience/frontend/widgets/shell_theming_group.py
-gradience/frontend/views/about_window.py
-gradience/frontend/views/main_window.py
-gradience/frontend/views/no_plugin_window.py
-gradience/frontend/views/plugins_list.py
-gradience/frontend/views/preferences_window.py
-gradience/frontend/views/presets_manager_window.py
-gradience/frontend/views/shell_prefs_window.py
-gradience/frontend/views/welcome_window.py
-gradience/frontend/main.py