[l10n] Update Makefile.in.in to handle qt4

[Lars Gullik Bjønnes]

This change makes Makefile.in.in also look at qt4 ui files.

In addition to that it changes the qt3 ui parsing to _not_ handle
caption names. I am not sure if this is wanted or not, but at least
the current captions are just bogus, so either we change them into
something useful, or we remove them completely as per this patch.

    <property name="caption">
        <string>BiblioModuleBase</string>
    </property>

Should I commit with both changes or drop the change to qt3 parsing?

-- 
        Lgb