Fix the dashboard layout to support and large screen support

[rohitmalhotra1420]

• Fix the current layout of the dashboard page so it also supports maxWidth:1200 in large desktop screens.
• Fix the width of the featured channels list on dashboard page for different screen sizes.

[rohitmalhotra1420]

The fix is done inside this PR: https://github.com/push-protocol/push-dapp/pull/1664

[rohitmalhotra1420]

To be merged with #1664