[Search] Adding a condition delete the other one(s) sometime

[pafonta]

Case 1: Annotations

1. Choose 'Annotation type' in the 'Search conditions' panel in the tab 'Annotations'.
2. Choose 'equation' as type.
3. Click on the leftmost (empty) combo box and select 'AND'.
4. The condition created at steps 1. and 2 is deleted and their corresponding combo boxes are now empty.

Case 2: Parameters

1. Choose 'Result type' in the 'Search conditions' panel in the tab 'Parameters'.
2. Choose 'function' as type.
3. Click on the leftmost (empty) combo box and select 'AND'.
4. The condition created at steps 1. and 2 is deleted and their corresponding combo boxes are now empty.

Note: In both cases, this behaviour happens also whatever the condition number (first, second, ...) for 'NOT'.