important line and region type misbehavior and bugs

The new automatic application to include all line and regiontypes of a segmodel applied to a document makes real life very complicated and it has created some bugs.

1. The 'default' line type and the 'text' regiontype of kraken's default model do not appear in our default ontology. Previously they were simply categorized as 'None'. That was fine. Now we will have 2 new pks for each type in the database for every doc segmented with the default model. This is exactly what we tried to avoid with the default ontology. Would it please be possible to return to previous behavior?

2. If you join two lines of same type, even the 'default' type, they get the 'None' type. see: #907 (closed)

3. I have a document where I unselected 'default' lines from the ontology, but the dbase still includes the old linetype pk for all individual lines in the linetable. They were exported with this linetype which doesnt exist anymore...