Auto close smilies dialog on long tap

[Kirby]

Inserting a single smilie / emoji currently requires at three taps / clicks:

1. Click on the smilie icon in editor toobar
2. Click on the smilie / icon in dialog
3. Click on X, somewhere else or hit esc to close the dialog

While this workflow is somewhat unavoidable for inserting multiple smilies / emojis at once, it could be smiplified a bit for a single smilie/emoji:
If the user performs a long tap on a smilie / emoji the dialog could close itself automatically.