startup: make sdlog2 working again on FMUv1
position_estimator_inav: lower RAM
Revert "position_estimator_inav: lower RAM"

This reverts commit b457e714972649f5a39fa3f2f9463bdfe6971fcc.
Merge pull request #633 from PX4/fmuv1_ram_cleanup

Fmuv1 ram cleanup
Startup: Hex vs Hexa
Merge pull request #639 from PX4/fix_hex_startup

Startup: Hex vs Hexa
Startup: Raise min throttle
Merge pull request #640 from julianoes/mc_min_throttle

Startup: Raise min throttle
Mixer load: don't upload empty mixers from non-existing files
Merge pull request #641 from julianoes/fix_mixer_load

Mixer load: don't upload empty mixers from non-existing files
Merge branch 'beta' into offboard2
commander: print_reject_mode() bug fixed