[#3615251]Use path in queries such as search:///path?xx as whole.

When we trying to parse and normalize such queries we step into many
problems so let just not do that.
Fix crash in search VFS enumerator when name wasn't requested.

The search GFileInfo should contain file name but FmPathEntry does not
request it. Anyway search does not contain subfolders therefore skip it.
Use ',' as search paths delimiter instead of ':'.

The ':' may be in search path (sftp://host/path for example) therefore we have
some problems with escaping them (we hardly can distinguish them on unescape
and also we cannot enforce non-unescaping those ':') so let use ',' instead.