The importation of files to collections was not working. Both because its dialogs were crashing and because the copying method was wrong. This patch does the following:
- fix the crash of confirmation dialog when either accepting or rejecting the import. The crash was caused because a "detroyed" signal was being used at a chain of deleted widgets, eventually causing a crash signal
- fix the file copying (SqlCollectionLocation.cpp). The code was using a QURL (with the "file:///" scheme) to locate the destination, and thus failing to find the destination dir
- fix the layout of Transcoding dialog. Before the buttonbox was doubled, and only the KPageDialog was being show. And was overlapped by another widget
- fix the layout of the importation configuration menu (OrganizeCollectionDialog). Before the QDialog didn't have a layout, and resizing the window was not resizing widgets
- restore the importation menu to "Copy to Collection". Before only "Move to Collection" was popping up an importation dialog. The reason was a wrong connection of signals