fixed position of show more/less button

Description

The position property "Show More..." / "Show Less..." button was changing to "fixed" when "Show More..." button is clicked(when the repos list is expanded). This behaviour was implemented by using "showMore" boolean variable. In the fix, i've removed the usages of the "showMore" variable and permanently assigned the position as "absolute".

Related Issue

Fixes #51

Motivation and Context

The Button was overlapping with the content on its back. This fix resolves that issue by fixing the button at the bottom of the list irrespective of the state of "repos" list (expanded/collapsed).

How Has This Been Tested?

I've tested this fix by running it on my local environment. This change does not affecting any other areas of the code(since the usage of "showMore" boolean was limited to the button.

Screenshots (if appropriate):

https://github.com/adobe/adobe.github.com/assets/100061869/70d1934e-b5ea-4303-9e11-fc236bac19ba

Types of changes

[x] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

[x] I have signed the Adobe Open Source CLA.
[x] My code follows the code style of this project.
[ ] My change requires a change to the documentation.
[ ] I have updated the documentation accordingly.
[x] I have read the CONTRIBUTING document.
[ ] I have added tests to cover my changes.
[x] All new and existing tests passed.

adobe / adobe.github.com