Jira: none
extrude 5 mm in place before drawing the pre-extrusion line
to ensure the filament stick to bed
add a dirty detection feature for carmera
support dual-head high-low temp check
Signed-off-by: qing.zhang <qing.zhang@bambulab.com>
Change-Id: Ia365d99fe764acf4815d24cfb96532b6f1d79990
(cherry picked from commit d17f5586103e4b87c8ae875846253658afb6e42d)