Revert "temperature: kelvin is high, introduce kludge factor"

This reverts commit 0ef76b617f7552bdca5ea3d7291d1fe7f3d6ffc5.

it's kind of needed for the 1.1.x series because reload_defaults() is called before module->gui_data is inited, which
results in an estimated daylight whitebalance of (1,1,1) in that branch. master has fixed that some time ago,
so the values make sense without kludging (yay :) )