Implemented DropDown and removed pycache files

[chauhannishh]

Implemented DropDown in StudyZone

StudyZone Dropdown

All Submissions:

• Have you followed the guidelines in our Contributing document?

New Feature Submissions:

1. Does your submission pass build tests locally?
2. Have you indented your code locally prior to submission?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?

[monsij]

Hope that you have followed the contribution guidelines. Please don't make a request anywhere to get a review. One of the maintainers will get back to it within a day or so. 😃

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[codecov]

Codecov Report

Merging #92 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #92   +/-   ##
=======================================
  Coverage   93.97%   93.97%           
=======================================
  Files          19       19           
  Lines          83       83           
=======================================
  Hits           78       78           
  Misses          5        5

Impacted Files	Coverage Δ
pro1/pro1/settings.py	100% <100%> (ø)	⬆️

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[monsij]

Many required files such as .github/ERROR_PAGES have been deleted. Hence it resulted in some conflicts as well. I'd suggest you to make changes from Github web interface itself and then make a PR. It is simpler and less complex that way @chauhannishh