selecting the clonks via hotkey was all backwards (#1031)

e.g. pressing ctrl+3 selected 1st clonk if there are 3 in the crew
fix possible block in tutorial 2 (#1036)

(cherry picked from commit c772ff8df686674f53c38aafb725ec6cce1768b5)
mac: Zoom in/out main menu commands also work in game mode, call Viewports. methods then
StdScheduler::Added is not necessarily called from the thread the
procedure is meant to be run on, so introduce yet another StdScheduler
extra method StartOnCurrentThread which on Mac OS X does the actual run
loop registration stuff and needs to be called from the actual thread
the scheduler is supposed to run on

StdSchedulerMac: Remove SCHAdditions objects again
cmake: mac: Reorder compiler flag selection a bit
C4NetIO: Place silly poll timeout fix where it actually helps in case of UDP
cmake: mac: Re-add libs bundling, revert to LegacyFindFreeType for APPLE because I don't know