Pe bug fixes

[ruixuantan]

After starting Tutor's Pet:

Should I refactor the createTag method to make it more testable and actually test it?

Resolves #235
Resolves #246

[codecov-io]

Codecov Report

Merging #253 into master will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##             master     #253   +/-   ##
=========================================
  Coverage     83.23%   83.23%           
  Complexity     1080     1080           
=========================================
  Files           148      148           
  Lines          3179     3179           
  Branches        381      381           
=========================================
  Hits           2646     2646           
  Misses          442      442           
  Partials         91       91           

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/tutorspet/ui/LessonCard.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
src/main/java/tutorspet/ui/StudentCard.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)

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[ypinhsuan]

LGTM!

[dextertanyj]

LGTM! Interesting cause of the tag colour bug. I think it would be good to refactor the tag logic into its own class, that way the tag colour does not depend on the student card class either.

[ypinhsuan]

Looks great!

[dextertanyj]

Awesome, LGTM!