Fixes #188, #333, #543: Fix missing sidebar and improve results

[simsausaurabh]

Changes proposed in this pull request

• Created new source for sidebar results. The older config was not getting results.
• Removed Trending hashtags from results page.
• Added more parameters to api/search.json to provide filtered search.
• Added source to be apiResponseResults from parent feed.component.ts to child feed-info.component.ts.

Screenshots (if appropriate)
The changes have been made and it looks more appropriate in live test link.

Link to live demo: http://pr-754-fossasia-loklaksearch.surge.sh

Closes #188
Closes #333
Closes #543

Note: Work is being carried out currently to show images on sidebar (The older implementation was trying to fetch images from twitter which do not works due to twitter updates).

[praveenojha33]

There are some problems with Travis Please check, make sure to include your changes in test files.

[codecov]

Codecov Report

Merging #754 into development will decrease coverage by 0.75%.
The diff coverage is 5.26%.

@@               Coverage Diff               @@
##           development     #754      +/-   ##
===============================================
- Coverage        52.57%   51.82%   -0.76%     
===============================================
  Files               99       99              
  Lines             2488     2499      +11     
  Branches           272      276       +4     
===============================================
- Hits              1308     1295      -13     
- Misses            1154     1178      +24     
  Partials            26       26

Impacted Files	Coverage Δ
src/app/reducers/index.ts	95.37% <ø> (ø)	⬆️
src/app/feed/feed.component.ts	31.32% <ø> (-13.12%)	⬇️
src/app/feed/info-box/info-box.component.ts	20.38% <5.26%> (-3.15%)	⬇️

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[simsausaurabh]

@praveenojha33 I will be writing test case for this patch and news tab collectively, since the changes will be made in almost same files so it will create chaos and bugs to manage it again. I will be writing clean tests combined for the sidebar feature and news tab feature. The changes are also a lot in the current patch.

[mariobehling]

Thank you. Please learn how to make screenshots of web pages that are larger than your screen. It is very easy! There are also plugins available.