1.Save multi extruder state in gcode processor
2.Add machine exturder change time
3.Fix some naming issues
jira:NONE
Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: I9785331290515eeb908ff0ff01aad5aac44212d9
(cherry picked from commit b49d4ca1539cd9f473e0ee0c79a4287c0d5fe03b)