slack: expose the FULL message instead of title.

Because slack uses it's own trim, we should avoid sending trimmed data and let users see the whole set.

rhodecode/integrations/types/slack.py

@@ -265,7 +265,7 b' class SlackIntegrationType(IntegrationTy'
         %for branch, branch_commits in branches_commits.items():
         ${len(branch_commits['commits'])} ${'commit' if len(branch_commits['commits']) == 1 else 'commits'} on branch: <${branch_commits['branch']['url']}|${branch_commits['branch']['name']}>
         %for commit in branch_commits['commits']:
-        `<${commit['url']}|${commit['short_id']}>` - ${commit['message_html_title']|html_to_slack_links}
+        `<${commit['url']}|${commit['short_id']}>` - ${commit['message_html']|html_to_slack_links}
         %endfor
         %endfor
         '''))