Fix #29: Change feature checkbox layout from 4 columns to 1 column for vertical display

[Dhanush010]

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Description

Include a brief summary of the proposed changes.

What changes are proposed in this pull request?

• 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 not to work as expected; for instance, examples in this repository must be updated too)
• This change requires a documentation update

Checklist:

• My code modifies existing public API, or introduces new public API, and I updated or wrote documentation
• I have commented my code
• My code requires documentation updates, and I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[jeanbez]

Thanks for the contribution! It would be better to avoid the scrolling bar and use the space more effectively instead of keeping it fixed to a single column. I would suggest still having multiple columns, if space permits, and do not limit the height to a small value, so as not to hinder the usability (example in the screenshot).

[jeanbez]

Let's try still having multiple columns, but trying to respect the screen width.

[Dhanush010]

Updated to multi-column layout (1-4 columns). No horizontal scrollbar, better space utilization.

Is 4 columns max sufficient, or should I allow more columns (5-6) for very wide screens?