Harmonize tab transitions to other transitions

[HenrikJannsen]

The new transitions added to tab view changes is not the same style as the transition used at normal navigation changes. Also the new left/right change is confusing (did a usability test and the candidate was confused why it comes sometimes left and sometimes right, he thought its a bug).

[axpoems]

I also noticed this, and agree that it is confusing. On top of that, the transition takes way too much time. IMO transitions should be subtle - just take time enough for the user to feel it changed gracefully, but still be almost non-perceivable.

My suggestion for this is to reduce timing as explained above and for the transition one of the following:

1. Stick to always transition sliding from the right.
   or,
2. Switch the current transition configuration. I.e., when going to a tab on the right, the content should come from the right as well (the opposite that it is now). I believe this is the reason why the current implementation looks confusing.

[HenrikJannsen]

I think it should have the exact transition style as the other main menu transitions. I think the user is not that aware of clicking left or right tab that it justifies to be reflected in transitions, but if you try it out with inverted directions and it works better I am open to it.