files: when filtering search results, ensure results are children of the fakeroot not just path starting the same

when storing back the data field 'encrypted' it is necessary to cast the boolean to an integer to make pg happy

only remember password if the user changes the permissions, otherwise the user disabled the password protection

use places/folder icon,
move link construction to JS,
only show icon on hover,
use 'searchresult' as css class name,
add filter/unfilter methods,
highlight searched files in current filelist
only filter when correct FileList is present

which reviewer did not test the pull request?