The commit confirmation alert can't be closed in the pipeline editor when in fluid layout

Problem

When you commit your config in the Pipeline Editor we show a confirmation alert which needs to be manually removed.

It's not possible to close the alert when in fluid layout or when the screen space it tight because the close button is hidden under the sidebar.

Proposal

Adjust the layout so the drawer doesn't cover the alert.

It looks like we need to adjust the right margin for the alert like we did for the main container in !78038 (merged). This should shorten the width of the alert so the close button is visible.