Do not modify the calibration type when updating the calibration page

Description

At the moment, the calibration type in the Calibration application is modified as soon as the calibration type is changed. This is not practical for multiple reasons:

• If the calibration web interface is already opened, the interface will not necessarily behave as expected (need to go back and forth between scan types).
• Multiple users looking in the calibration interface in parallel will interfere with each other.
• Scripting the calibration actions is made more complicated than needed.

One should make independent the web interface updates and application of the settings.

Possible fixes

A possible easy fix is:

• The setCalType function should not set the m_calType variable, but merely return the new web interface fragment:
  • Ideally the function is renamed and moved to the CalibrationWeb class (separation of concerns).
  • The utility of m_calType can also be re-evaluated.
• The cal_type_select variable is already sent to the applyAction function and can simply be retrieved from there.