Revert "dnld button"

This reverts commit 2aece39c29f21f3a6ab8b7f8556de0b49e388dba.

Conflicts:
	files_pdfviewer/templates/pdf.php
Revert "download button misteriously disapeared"

This reverts commit 9ff8b0a2801412a14483f40e9766732441231c17.
Revert "replace close button"

This reverts commit 4c430ea6d89c423321d1550e473811c682eb2071.

Conflicts:
	files_pdfviewer/js/loader.js