UI: add background / atmospheric audio effects
UI: request full screen on ctrl-f/ctrl-F

Also small tweaks to completely remove scroll bars &
small TODO comment
UI: initialize entity gfx when clicked in nav

Fixes small regression due to entity gfx not being available
in clicked handler + outstanding bug where mesh selection effect
not taking due to non-initialized gfx
UI: seperate entity_container refresh details/cmds

Invoke appropriate refresh operation at appropriate time
UI: small fixes to cutscenes to reflect recent js changes
Increase the station construction distance
UI: fix broken tests