Color input width broken by djangocms-admin.css

[fallenflint]

Description

Input type=color seems to be broken by djangocms-admin.css I've got color picker without color inside. A little investigation shown that issue connected to css rule width: auto for button, input, select, textarea. Disabling it fixes color input.

## Steps to reproduce

Simply use anything that renders to input type="color" on admin page.

Expected behaviour

Normal color input look.

Actual behaviour

Broken color input without selected color visible

Additional information