Added search_fields to channel admin.
Set Logger, Ping, Last Seen and Help as default plugins when creating a
channel.
Use pg_class to make count for page count faster.
Fixes the public channels listing on the dashboard.
Merge pull request #40 from vbabiy/fix-dashboard-public-channels

Fixes the public channels listing on the dashboard.
Merge pull request #39 from vbabiy/speed-up-log-page

Use pg_class to make count for page count faster.
Merge pull request #36 from vbabiy/search-channels

Added search_fields to channel admin.
Merge pull request #37 from vbabiy/channel-defaults

Set Logger, Ping, Last Seen and Help as default plugins when creating a