#2827 Always show Action button on the next line

[nmgokhale]

Fixes #2827

Before -
Action button used to show next to inaccessible controls. This is inconsistent as the action button shows up on next line for accessible controls.

Now -
Action button shows up on next line for both accessible and inaccessible controls.

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[nmgokhale]

This class was added to fix alignment issue for Action image in this PR - #2258

But it was being applied to Action button and custom actions as well. Fixed the condition to add this class for Action image only.

[caritaou]

Thanks @nmgokhale, can you add a comment in the code or css that mentions only images will be displayed flex inline and all other actions will be inline by itself?

[nmgokhale]

Action buttons have display: inline-block.

For Custom actions, we add display: flex on the parent div. We don't add any CSS for .properties-custom-action class because host app can add a custom class on this div and specify their own CSS.
This is added in documentation -

Common-properties provide a placeholder to add a custom action. Host application should add appropriate CSS for custom action to match with design specs.