- added a new parameter in Preferences to control the number of processes created by the Pool() - more processes better performance but also a lot of memory consumed
- made sure that the display of messages in the Status Bar is done asap
- in Document object fixed the issue with not setting selection color when in a dark theme (essentially got rid of using QPalette)
- in dark theme stylesheet changed the indent of the QCheckBox (and in Radio buttons too)
- updated the FClabel widget with some more properties
- updated the hack to make sure that the Editor sub-tools do not lose the stylesheet of the background
- updated the disabled project item color default value for the dark theme
- in SolderPaste Plugin make sure that the preprocessor is set the same for all tools (nozzles) whenever is modified
- added 2 new preprocessor files for the SolderPaste Plugin (GRBL and MARLIN)
- in SolderPaste Plugin made sure that the start GCode is not added for each nozzle but only once at start
- in SolderPaste Plugin added a new parameter: 'Feedrate Rapids' which will set the feedrate for the fast moves as opposed with the previously used G0 command. This allows to fine tune the fast moves to reduce the vibrations
- in Solderpaste Plugin fixed the CNCJob plotting
- in Solderpaste Plugin added a new parameter 'Margin' which allows reducing how much solderpaste is added and therefore adding a space between the solderpaste and the pad boundary
- all CNCJob objects generated by the Solderpaste plugin now have the GCode saved as source_code which can be saved also from the CNCJob object context menu, and edited
- fixed a number of issues, mostly leftovers from moving the UI of a Plugin in its own class
- fixed some bugs in the Punch Gerber plugin
- fixed some bugs where the 'pool' parameter was not passed when creating shapes collections (in 3D graphic mode); I wonder how it worked until now
- added a new feature in the Isolation Plugin: now for all the isolation Geometry objects this plugin can do a supplementary simplification of the geometry using the tolerance parameter defined in the General Parameters. This should lead to a reduced number of tool lifts when doing corners
- remade the Film Plugin such that the `skew` feature is now done in length units as opposed with the previous usage of angles
- refactored some big methods from the Film Plugin
- some more code is refactored in the Preferences
- the axis will now be drawn on the canvas as they were left in the previous run (just like the HUD and the Workspace)
- for processors with less than 4 cores now the default number of workers is 1 (changed from 2)
- some graphical settings go now directly to the defaults dictionary and will not pass through the `options` app dictionary
- fixed some outstanding issues from the PyQt6 port
- PEP8 fixes
- minor fixes
- updated the saving of Preferences to update the self.options too: the `Apply` action will update the self.options but the `Save` action will save the updated preferences to the file on disk
- added ability to turn off the outline plotting for Gerber objects (will speed up the plotting but the plotting visual quality will degrade); controlled from Preferences -> Gerber -> General
- plotting visuals in 3d graphic mode will no longer create some unnecessary lists
