Revert "tdf#105566 Close Infobar after clicking action button"

This reverts commit 05799076 as discussed with UX.

Change-Id: I24c2a0efc0c866f895a00121f083eb526642650f
Reviewed-on: https://gerrit.libreoffice.org/34473Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

sfx2/source/view/viewfrm.cxx

@@ -1349,7 +1349,6 @@ IMPL_LINK_NOARG(SfxViewFrame, SwitchReadOnlyHandler, Button*, void)
 
 IMPL_LINK_NOARG(SfxViewFrame, SignDocumentHandler, Button*, void)
 {
-    RemoveInfoBar("signature");
     GetDispatcher()->Execute(SID_SIGNATURE);
 }