Viewport view defaults to lit.. Bug,setting or feature?

Hi,

I noticed since UE 4.5 that, everytime I open a new project/level, all viewports switch to “lit”.
This is kind of annoying for me since I use the Top-Left-Front views mostly in wireframe mode, thus I always have to change it.
Is this a setting that I may have accidentially changed or a new setting that I havent changed?

Cheers,
Klaus