SearchKit - Use crmDialogButtons for task popups

[colemanw]

Overview

Updates the buttons in SearchKit action popups to use standard dialog button formatting.

Before

Ad-hoc buttons inserted into the body of the dialog. This runs the risk that the buttons can scroll out of view.

After

Buttons fixed to the bottom of the dialog.

Technical Details

Uses new crmDialog and crmDialogButton directives.

[civibot]

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[monishdeb]

Tested on my local, r-run passed.