* Fix for SPE-1659 : Wrong filaments update, when templates are allowed/suppressed
* Per Extruder Filaments (related to SPE 1599)
* Implemented compatibility for each extruder separately
* Update of the filaments compatibility is extracted to separate function update_filaments_compatible()
* Fixed synchronization of config.ini with the current selections, when preset is changed from sidebar.
* Filament Settings Tab improvements:
* Added extruder combobox to select active extruder
* PresetCombobox is updated in respect to compatibility for active extruder
* For MM printer: Cog icon near the filament will switch to Filament Settings for selected filament
* Bug fixing for https://dev.prusa3d.com/browse/SPE-1599
* Next round of bugfixing for https://dev.prusa3d.com/browse/SPE-1599
* Fixed crashes from https://dev.prusa3d.com/browse/SPE-1599
+ code refactoring for Tab:save_preset()