+ fixed a bug : Case sensitivity of printer's name wasn't check during the adding of a new printer,
as a result in printers list was appeared both of printers (ex. "YuSanka" and "yusanka"), but related file was just one.
1) All slicer's exceptions are now derived from Slic3r::Exception.
2) New exceptions are defined for slicing errors.
3) Exceptions are propagated to the Plater to show.
It remains to modify the slicing back-end to throw the new SlicingError
exceptions instead of std::runtime_error and to show the other exceptions
by a message dialog instead of a notification.
Renamed login/password/authorization_type to printhost_user/printhost_password/printhost_authorization_type.
Added initialization of physical printer preset with default values.
* Now we show a list of printers name with selected preset
+ Added a edit_button for the editing of the physical printer fro the Settings Tab
+ Show whole list of the loaded presets with "Print host upload"
- Added possibility to correct delete presets considering with the physical printers
- Smart switching to the printer preset if physical printer was selected
* Create full printer name as a PrinterName + RelatedPresetName
* Added printer model to the PhysicalPrinter.config => Enable to select just between presets with same printer model
* When physical printer is selected and create new preset ask if should we use this preset for selected ph_printer or just to switch for it
