TYPO3 Core

The problem is visible with the icon used for insert from clipboard.

There is a icon used "insert5.png" (see insert1.png). Same icon exists in t3skin, but it's not shown because forceFileExtension is set to "gif"

So the function looks for insert5.gif, which doesn't exists and displays the one from oldskin.

Solution:
use a fallback if the icon with forceFileExtension doesn't exists and look for original file (insert5.png). The attached patch does this and fix the problem, the icon from t3skin is shown now.

(issue imported from #M9773)