Allow to set print sequence manually

[alexandr-vladimirov]

Description

Closes #4835
Adds a feature to allow to arrange the object list and set the print sequence manually in One at a Time mode.

Implemented taking into account:

• grouping\ungrouping objects
• checking if user defined order is safe to print (no collisions between objects)
• saving\loading project

Not implemented:

• undo\redo operations
• mode without any checks for collisions

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Printer definition file(s)
• Translations

How Has This Been Tested?

• Test A
• Test B

Test Configuration:

• Operating System:

Checklist:

• My code follows the style guidelines of this project as described in UltiMaker Meta and Cura QML best practices
• I have read the Contribution guide
• I have commented my code, particularly in hard-to-understand areas
• I have uploaded any files required to test this change

Screenshots

[5axes]

This is a request often made by the community. I hope Ultimaker will approve this addition as soon as possible.

[saumyaj3]

Hey @alexandr-vladimirov! the changes you made are really beautiful. Thank you for the contribution 👯

[SneakyTiki]

Thank you so very much for putting this together. The literal 'dozens' of us who print large/tall objects one at a time seriously appreciate it. Massive improvement over running old versions with bugs which allow it :)