Simplify.
Merge topic 'fix-Qt-Autogen' into next

852d0724 Simplify.
QtAutogen: Fix use of multiple ui files in a single target.

Don't store a mapping of the directory to the ui file. The directory
will be a unique key, allowing only one ui file to be specified.
Use the source file name instead as the mapping key.
Merge topic 'fix-Qt-Autogen' into next

71a11252 QtAutogen: Fix use of multiple ui files in a single target.