Bugfix: text slide type in participant view

Bug type: --- TypeError: Cannot read property 'id' of undefined

changed milestone to %Vecka 20

added Bug Client Development labels

created branch 199-bugfix-info-slide-in-participant-view to address this issue

changed title from Bugfix: info slide in participant view to Bugfix: text slide type in participant view

mentioned in merge request !153 (merged)

closed with merge request !153 (merged)