Preselect current loadout based on currently selected tree

[deathbeam]

Before this change the information about selected loadout in dropdown is lost on closing and reopening build. With this change it tries to match selected loadout with active tree.

Link to a build that showcases this PR:

https://pobb.in/j3Z597YrowzK

Before screenshot:

After screenshot:

[deathbeam]

Alright updated, new testing pobbin as I had to adjust for config sets etc:

https://pobb.in/j3Z597YrowzK

EDIT:

Hmm, actually it doesnt work still, will update

[deathbeam]

Alright now it should work