[MM-166] Fix issue: decription not visible in tooltip and removed "see more" link

[raghavaggarwal2308]

Summary

• Fix issue: description not visible in tooltip.
• Removed the see more link in the tooltip.
• Set a max length for the tooltip description.

Screenshot

What to test

• Description and other contents are visible in the tooltip properly.
• "See more" link is removed
• When the description is very long it's getting trimmed.

Steps to test:

1. Connect your GitHub account
2. Hover over a PR/Issue link.

Ticket Link

Fixes #734

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (2608197) 15.78% compared to head (ff27370) 15.78%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #735 +/- ## ======================================= Coverage 15.78% 15.78% ======================================= Files 15 15 Lines 5770 5770 ======================================= Hits 911 911 Misses 4817 4817 Partials 42 42 ```

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