gcr: Fix issues in GcrPromptDialog display
gcr: Fix issues in GcrPromptDialog display

 * Allow message and description to wrap
 * Focus password entry on startup
 * Put spinner on main action button

Distrotech/gcr,Distrotech/gcr,Distrotech/gcr,Distrotech/gcr,stefwalter/gcr,stefwalter/gcr,stefwalter/gcr,stefwalter/gcr