QInput / QSelect icon property

[robsontenorio]

It would be nice if QInput/QSelect had icon property, just like QBtn.

I would avoid extra boilerplate using <template #append> just for a simple icon.

[pdanpdan]

An icon property would need 4 properties
Then 4 more for a label
Then you need to put a tooltip or a button, so you would reduce the boilerplate to only o few dozens properties that would not cover what you need