[Feature Request]: Full-width layout

[deepspaceaxolotl]

Guidelines

• I have searched the issue tracker for open and closed issues that are similar to the feature request I want to file, without success.
• I have searched the documentation for information that matches the description of the feature request I want to file, without success.
• This issue contains only one feature request.

Problem Description

Spinning this off from #3918, the layout of a lot of pages, such as the subscriptions page, could be wider, as the current padding limits the number of videos that can be displayed in favour of empty space, particularly on small screens or at higher zoom levels.

Proposed Solution

Implement a setting for a full-width layout as per #4379, excluding the settings page which is fine as is and would be too busy otherwise.

Alternatives Considered

Allow for custom CSS styling? Much more complex to implement but would solve a lot of issues in advance, potentially.

Issue Labels

visual improvement

Additional Information

No response

[deepspaceaxolotl]

As it currently stands, on smaller screens (in my case, 1080p at 125% zoom, making it effectively act like an 864p screen), it is not possible to both have a narrow enough window to see the video and playlist controls for a video without scrolling and to have a full grid of four columns on playlist, channel and subscriptions pages. Would love for any solution to allow for this, though that perhaps might require opening another issue about the location of the video and playlist control buttons (which are pushed down by both the likes count and the row the channel name is in, even if the former is turned off).