Message icon correction

[fairking]

I feel that the message icons should be another way around. Is the any way to change the icons? Based on my analysis and documentation it is not possible at the moment.

1. I think the success message must have pi-check icon and the info message must have pi-info-circle icon.
2. Would be nice to add a property which overrides the default icon in case if you need something completely different based on the message context.
   Please let me know what do you think.

[fairking]

For a while I did the following trick:

.p-messages-icon {
	&.pi-check::before {
		content: "\e924";
	}
	&.pi-info-circle::before {
		content: "\e909";
	}
}