allow multiple image upload from camera

[sandrozbinden]

• evaluate new plugin https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-media-capture/**
• replace plugin
• allow multiple selection after Allow multiple image upload from browser selection #549 is done

[mleu]

due to technical limitation of current plugins must be clarified with stakeholders, may be solved with #552
(was 3 points in sprint 12)

[sandrozbinden]

stakeholder do not know yet what needs to be done -> requirements engineering needed