Fix broken layout of asset library page

[eugene87222]

While reviewing #87407, I came across two additional problems. I've recorded a demo to help explain.

2024-02-24.19-00-55.mp4

The first issue, as described in #87407, occurs when horizontally scaling the project manager window while on the asset library page, resulting in a broken layout.

The second issue occurs when scaling to the point where the third column appears. It becomes evident that the widths of the three columns are not evenly distributed.

The third issue occurs when navigating to the asset library page after opening a project and then scaling. As the number of columns in the asset library increases, it becomes impossible to reduce the number of columns. Even attempting to narrow the width of the asset library doesn't work.

My current solution involves fine-tuning the size of asset_items_columns_width and performing a clamp operation each time _update_asset_items_columns is executed.

Below is the demo video of my solution.

2024-02-24.19-04-15.mp4

Also, I noticed a refactor todo item in the clamp_width function. However, I found that refactoring the LinkButton to support ellipsing functionality similar to Button might not be straightforward for me. I'm also unsure if it would cause some spec changes for LinkButton, so I haven't tackled it from that angle.

Bugsquad edit:

• Fixes Godot Project Manager Layout is broken when trying to access asset library. #87407

[KoBeWi]

I think column problems can also be solved by using HFlowContainer instead of GridContainer, no?

[eugene87222]

I see. I'll try it.

[eugene87222]

Seems not. HFlowContainer only stacks items horizontally, without guaranteeing vertical alignment.

[KoBeWi]

You could try using EXPAND flag on library items, it might force them to have the same size. Though it will break on rows with less items 🤔

[KoBeWi]

Well the GridContainer works alright and this fixes the issue.

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 4.2.2.