Sections - Custom sources override column names

[anchovy]

Be great if we could override the field label when customising the default columns displayed for different Sections.

Currently it uses the field label, but in a lot of instances, especially when it's a Lightswitch field the label can be quite long and this throws out the display.

For example - if we had the field label 'Allow users to submit before account is confirmed' for a Lightswitch and added this to the default view we get a massively wide column.

This could either be done on the field itself, or ideally in the 'Custom sources' model, so it's specific to the section view.

[anchovy]

Here's a couple of snaps to show what I'm getting at.
Potentially we'd need some icon or a hover state so the user could see the original field label.

Current:

Proposed: