Improve notices on Repositories admin page

[Ryan J Ollos]

The Repositories admin page displays the following when adding a new repository:

close

• The repository "somerepos" has been added.
• You should now run trac-admin $ENV repository resync "somerepos" to synchronize Trac with the repository.
• You should also set up a post-commit hook on the repository to call trac-admin $ENV changeset added "somerepos" $REV for each committed changeset.

In the second bullet, $ENV could be replaced with the actual path so that the user can copy the line to the console. In the third bullet we can help the user by displaying a link to TracRepositoryAdmin#Synchronization.

When the repository path or type is changed, the following message is displayed:

close

• Your changes have been saved.
• You should now run trac-admin $ENV repository resync "somerepos" to synchronize Trac with the repository.

$ENV can be replaced with the actual path here as well.

When the repository name is changed the following is displayed:

close

• Your changes have been saved.
• You will need to update your post-commit hook to call trac-admin $ENV changeset added "somerepos2" $REV with the new repository name.

$ENV can be replaced with the actual path here as well.