[EditableText] Add support for rightElements in EditableText

[jmhain]

Title says it all.

Edit: More Details

When an EditableText is being edited, I would like for the rendered input or textarea to display a minimal button or tag on the right, as can be done via the rightElement prop on an InputGroup.

[llorca]

There's no room for any icon in an editable text, so I'm afraid the title doesn't say it all. Can you elaborate on your use case?

[jmhain]

Sorry, I updated the description with more details. The use case is to include a button for a file attachment while in edit mode, then a Tag with the filename of the attachment.

[adidahiya]

I think this could work; it could be like the "clear" button in TagInput:

[llorca]

doesn't sound much like an editable text but something much more complex instead, would probably need to rewrite most of the component. adding as feature request for now

[goodmind]

Want this too

[colmex]

This would be super handy too. Feels like mirroring some of the InputGroup props in editableText would make sense. rightElement and leftElement at least.