The activation of languages was changed at bd3a553ad9
This commit makes a few changes/fixes
- When executing the toggle_active method do not open the wizard but load
directly the language
- Rename the name of the button in tree view, Download was confusing as implies
the resources are downloaded while it is only loaded
- Remove duplicated help
- Add action button to load the language from the form view (as it the only way
from the form view was using the "Unarchive" action)
- Add label directly next to the field (was making a line return)
- Set the placeholder on the field (no effect on the label)
- Remove groups as the view is already restricted to system users
Follow-up of task id 2026150
closesodoo/odoo#34940
Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>