Nat and eve squash bugs

[sima-qian]

• [x] Tile has overflow: hidden
• [x] Does wrapping words work (could overflow be overriding it)? Revision:
• [x] Add margin-right for timer Coming soon page:
• [x] coming soon icon size
• [x] coming soon page written in sass
• [x] coming soon back button Topbar
• [x] still written in sass Input boxes:
• [x] Add markscheme input box no longer uppercase
• [x] CaseTitle input change styling of text
• [x] Change colour of outlines to dark-grey text area
• [x] still written in sass

[codecov-io]

Codecov Report

Merging #159 into master will increase coverage by 0.96%. The diff coverage is 90%.

@@            Coverage Diff             @@
##           master     #159      +/-   ##
==========================================
+ Coverage   81.81%   82.78%   +0.96%     
==========================================
  Files          15       15              
  Lines         143      151       +8     
  Branches       20       21       +1     
==========================================
+ Hits          117      125       +8     
  Misses         21       21              
  Partials        5        5

Impacted Files	Coverage Δ
src/components/TopBar/TopBar.js	100% <100%> (ø)	:arrow_up:
src/components/TopBar/BackButton.js	100% <100%> (ø)	:arrow_up:
src/components/TopBar/CompleteButton.js	80% <75%> (+5%)	:arrow_up:

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