ui: defer setting pager related properties until the pager has spawned When --pager=on is given, dispatch.py spawns a pager before setting up color. If the pager failed to launch, ui.pageractive was left set to True, so color configured itself based on 'color.pagermode'. A typical MSYS setting would be 'color.mode=auto, color.pagermode=ansi'. In the failure case, this would print a warning, disable the pager, and then print the raw ANSI codes to the terminal. Care needs to be taken, because it appears that leaving ui.pageractive=True was the only thing that prevented an attempt at running the pager again from inside the command. This results in a double warning message, so pager is simply disabled on failure. The ui config settings didn't need to be moved to fix this, but it seemed like the right thing to do for consistency.