test: Improves unit tests for ColumnType + QA fixes

[ttannis]

Summary of Changes

This PR completes our code complete criteria for the targeted feature branch.

1. Updates parser.ts logic to cover an edge case in Presto types. (Commented as Case 3.1 in code, case is included in unit tests)
2. Updates styles based on design QA
3. Support for logging click interaction on the column type button.

Tests

1. Adds improved test coverage for parser.ts, using similarly complicated structures found in production.
2. Adds improves test coverage for ColummnType

Documentation

N/A for this feature.

CheckList

Make sure you have checked all steps below to ensure a timely review.

• PR title addresses the issue accurately and concisely. Example: "Updates the version of Flask to v1.0.2"
  • In case you are adding a dependency, check if the license complies with the ASF 3rd Party License Policy.
• PR includes a summary of changes, including screenshots of any UI changes.
• PR adds unit tests, updates existing unit tests, OR documents why no test additions or modifications are needed.
• In case of new functionality, my PR adds documentation that describes how to use it.
  • All the public python functions and the classes in the PR contain docstrings that explain what it does
• PR passes all tests documented in the developer guide

[Golodhros]

LGTM

Some minor comments