- Change Notify to Ci::Notify
- Downgrade sidekiq to fix CE errors: otherwise we need to check deliverables

This reverts commit 345ff6cb.

This requires sidekiq >= 3.4 and fixed all other CE tests

Cleanup some html/css for upload feature

* fix colors to match UI style
* cleanup templates from meaningless code
* improve placeholders
* remove code duplication in template
* improve error handling: remove file automatically
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

For #2520

See merge request !1297

# Conflicts:
#	Gemfile.lock

Add a help text to the Slack Service

When setting up the service I was not sure which webhook I should use, by adding
this Help text I hope we can help people in the future with setting up this hook

See merge request !1302

Dynamically adjust placedholder for uploads and fix Dropzone event handlers

Override error handler to prevent error messages from being inserted underneath image preview

Fix tests

Use regexp instead of startsWith for better browser compatibility

Remove duplicate code in _replace.html.haml and use one template

Remove files upon error and retain alert messages until user adds a new file

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Use fixed version of fogbugz gem

This allows us to properly handle authentication errors.