Add filter by my reaction
What does this MR do?
Add filter by my reaction.
Are there points in the code the reviewer needs to double check?
- UI/UX
- SQL performance - tested in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/12962#note_35975540
- This filter is ignored if an anonymous user searches the issues in public projects
Why was this MR needed?
I want to search issues that I have added a reaction 
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
- 
Changelog entry added, if necessary 
- 
Documentation created/updated 
- 
API support added 
- Tests
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Added for this feature/bug 
- 
All builds are passing 
 
- 
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Conform by the merge request performance guides 
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Conform by the style guides 
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Branch has no merge conflicts with master(if it does - rebase it please)
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Squashed related commits together 
What are the relevant issue numbers?
Edited  by Sean McGivern



