Main window: Doc list: disable stock icon rendering. We only render pixbufs now

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Main window: test

Signed-off-by: Jerome Flesch <jflesch@gmail.com>
Merge branch 'testing' of github.com:jflesch/paperwork into testing
Main window: optim search results display: detach the model before updating it and reattach it next

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>