Fix failing tests due to missing MessageMiddleware in tests

Merge remote-tracking branch 'upstream/master'

Merge branch 'delete-activation-profiles' into 'master' ...

Delete AddressConfirmationProfiles fixes #39, #40

The profiles get deleted if:
-Activation succeeded
-Activation is expired

also fixed error, when the key doesn't correspond to any Profile
remove then unused template

See merge request !20

Merge remote-tracking branch 'mailman/master' into delete-activation-profiles

Redirect to page where emails can be added if the activation link has expired

Merge branch 'use_bau' into 'master' ...

Use Django's build_absolute_uri method

This will also enable VirtualHost support, since Django's
`build_absolute_uri` method looks into more relevant environment
variables.

I updated the corresponding test and they all still pass.

See merge request !2

Merge branch 'sort-lists' into 'master' ...

Sort the lists by address on the front page

By default, the list index on the front page is sorted by creation time, which is very counter-intuitive.

See merge request !11

Merge remote-tracking branch 'upstream/master'

Merge branch 'adapt-to-python3' into 'master' ...

adapt exception handling to make it python3 compatible

also removes a print statement, that does not make any sense

See merge request !24

Fix #54

Merge branch 'regroup-links' into 'master' ...

Regroup links in list settings

Doing this reduces the number of if statements that need to be processed

See merge request !28

Merge branch 'fix-tooltips-opening-new-tabs' into 'master' ...

prevent tooltips from opening new tabs

_target="blank" caused new tabs opening in firefox, chromium and vivaldi

See merge request !15

Fix the link to HyperKitty to be more specific

Use Django's build_absolute_uri method ...

This will also enable VirtualHost support, since Django's
build_absolute_uri method looks into more relevent environment
variables.

Sort the lists by address on the front page

Use Django's auth views and honor login / logout urls

fix HttpError imports

Regroup links in list settings ...

Doing this reduces the number of if statements that need to be processed

change for loop to a len() statement

adapt exception handling to make it python3 compatible ...

also removes a print statement, that does not make any sense

Delete AddressConfirmationProfiles fixes #39, #40 ...

The profiles get deleted if:
-Activation succeeded
-Activation is expired

also fixed error, when the key doesn't correspond to any Profile
remove then unused template

Fixes #28

Merge branch 'fix-html-issues' into 'master' ...

fix html issues

fix missing html closing tags
fix missing spaces between li and it's id
fix wrong "for" entries in labels

See merge request !16

Merge branch 'change-documentation-to-use-gitlab' into 'master' ...

Modify the documentation to point to GitLab

also fixes broken link to mailmanclient's documentation

See merge request !12

Fix missed occurrence of Bazaar and old link to documentation

fix html issues ...

fix missing html closing tags
fix missing spaces between li and it's id
fix wrong "for" entries in labels

prevent tooltips from opening new tabs ...

_target="blank" caused new tabs opening in firefox, chromium and vivaldi

modify links to use https instead of ssh ...

using ssh links assumes public keys have been added
and thus fails if users have not registered with GitLab

Modify the documentation to point to GitLab ...

also fixes broken link to mailmanclient's documentation

Fix bogus error messages in domain creation