[BUGFIX] Improve preview of InputLinkelement

- Use a div instead of an input field to avoid issues like
  tooltip not shown because of the disabled attribute.
- Trigger onchange from LinkBrowser popup
- If no value found, show the input field, which makes it easier
  to e.g. enter an external url.
- Show helpful title for toggle button on hover

Resolves: #79667
Related: #79670
Releases: master
Change-Id: If00d892d0ae7aebe0dfc5f17f5d43af16d0ee730
Reviewed-on: https://review.typo3.org/51592


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>