Updated the UI test files

[shreyakhajanchi]

Updated test files for all the UI components for successful run.

Command executed:
ng test

[manitgupta]

Before we get into the details of the PR, can we add the following -

1. Can you publish the current % coverage, with the UI unit tests added?
2. Can we update github actions to run the UI unit tests as part of the PR processes? Looks like the UI unit test can be step in the code-coverage-check action.

[codecov]

Codecov Report

Merging #648 (f38a830) into master (1d29000) will decrease coverage by 5.86%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #648      +/-   ##
==========================================
- Coverage   54.25%   48.39%   -5.86%     
==========================================
  Files          65      117      +52     
  Lines       12355    15780    +3425     
  Branches        0      468     +468     
==========================================
+ Hits         6703     7637     +934     
- Misses       5185     7657    +2472     
- Partials      467      486      +19     

Components	Coverage Δ
backend-apis	43.54% <ø> (ø)
backend-library	60.21% <ø> (ø)
cli	0.00% <ø> (ø)
frontend	27.27% <100.00%> (∅)

Files	Coverage Δ
...ponents/add-new-column/add-new-column.component.ts	57.14% <100.00%> (ø)

... and 51 files with indirect coverage changes

[bharadwaj-aditya]

LGTM