[KPhotoAlbum] Do not show search widgets in annotation dialog.

[Andreas Neustifter]

Hi!

The annotation dialog is also used for doing searches, currently some
of the search related widgets still show up in the annotation dialog.

https://github.com/astifter/kphotoalbum-fork/commit/639f8470ceb0ff1b70638ccecdf441382ceb5f3e
fixes that by hiding the proper portions of the UI when using the
annotation dialog for annotiations.

Andi