Packed icons on sidebar in File Chooser

[pongloongyeat]

Prerequisites

• [x] I have searched open and closed issues for duplicates.

Describe the bug

Spacing between icon and text on sidebar is too small in file chooser.

To Reproduce

Steps to reproduce the behavior:

1. Anything that opens FileChooser

Expected behavior

Screenshots or screen recordings

In comparison to the sidebar in Files for instance

The spacing between the icon and text in FileChooser is a little too tight. The margin around the breadcrumb is also very small, though I'm not sure if this is a design decision or not.

Logs

Platform Information

• [ ] I'm using the latest version from git that I've manually compiled
• [ ] I'm using the latest released stable version

Additional context

[danirabbit]

Depends on https://github.com/elementary/files/pull/1417 and probably also https://github.com/elementary/files/pull/1453

[jeremypw]

The current Filechooser is basically the Gtk.FileChooser with the pathbar replaced by the Files one. Once the NativeFileChooser portal is implemented then we will be able to provide a completely redesigned FileChooser that will match the FileManager UI.