Highlight message

[wiruzx]

This pull requests adds ability to spotlight the message when using scrollToItem method on BaseChatViewController

For compound messages it's supported out of the box. It'll tint background color of CompoundBubbleView.
If you'd like to support other presenters, override spotlight method in your presenter.

You can specify which color to use for tinting background of CompoundBubbleView in DefaultCompoundBubbleViewStyle.
By default we're reducing brightness of background color by 15%.

You can also change how long bubble is going to be spotlighted in DefaultCompoundBubbleViewStyle.
Default value is 0.5 seconds.

[codecov-commenter]

Codecov Report

Merging #670 into master will decrease coverage by 55.33%.
The diff coverage is 0.00%.

@@             Coverage Diff             @@
##           master     #670       +/-   ##
===========================================
- Coverage   73.38%   18.04%   -55.34%     
===========================================
  Files          19       97       +78     
  Lines        1236     5027     +3791     
===========================================
  Hits          907      907               
- Misses        329     4120     +3791     

Impacted Files	Coverage Δ
...atto/Source/Chat Items/BaseChatItemPresenter.swift	50.00% <0.00%> (-1.03%)	⬇️
...ource/Chat Items/ChatItemProtocolDefinitions.swift	42.85% <0.00%> (-7.15%)	⬇️
...tController/BaseChatViewController+Scrolling.swift	55.55% <0.00%> (-8.28%)	⬇️
...ems/CompoundMessage/CompoundMessagePresenter.swift	0.00% <0.00%> (ø)
...ems/CompoundMessage/Views/CompoundBubbleView.swift	0.00% <0.00%> (ø)
...ompoundMessage/Views/CompoundBubbleViewStyle.swift	0.00% <0.00%> (ø)
...poundMessage/CompoundMessagePresenterBuilder.swift	0.00% <0.00%> (ø)
...ditions/Source/Common/UIEdgeInsets+Additions.swift	0.00% <0.00%> (ø)
...rcleProgressIndicatorView/CircleProgressView.swift	0.00% <0.00%> (ø)
...attoAdditions/Source/Common/UIView+Additions.swift	0.00% <0.00%> (ø)
... and 74 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update d465a14...d89dac0. Read the comment docs.