Fix non-instance user select form
allow to add html in category long_description
restrict iframe width
Merge pull request #913 from xi/feature-embeds-in-category

embeds in category
Better flash messages after sending of activation links - with spam hint
Merge pull request #914 from xi/feature-spam-spam-spam-spam-eggs-and-spam

Better flash messages after sending of activation links - with spam hint
i18n: extract messages
Fixup 7e73f11f9bc5c22dc8c18f9b351eb70f06a95e44
i18n: extract messages
i18n: update
pep8
Add CHANGES for 2.4.5
Merge tag '2.4.5' into feature-geo
Allow generic instance setting overwrite

All settings can now be overwritten on an instance base by

1. activating allow_overwrite on a setting, e.g.

    adhocracy.comment_wording.allow_overwrite = true

2. using it, e.g.

    adhocracy.comment_wording.aalen = true

For some settings, which commonly use instance overwrites, this will be
enabled in adhocracy.config.DEFAULTS.
Use generic instance overwrite for adhocracy.hide_individual_votes
Allow instance overwrite 'adhocracy.listings.instance_proposal.sorting'
Allow instance overwrite 'adhocracy.comment_wording'
fixup 42d1ce67b7207414eca8dc5c58ab3807ba0afd04
Merge pull request #915 from nidico/feature-generic-instance-options

Generic instance setting overwrites
Add permission poll.show_result with per instance configution