Update Bug templates to better reflect development process

[NielsKorschinsky]

Is your feature request related to a problem? Please describe.

• I need always to add another section when there is a bug or delete an existing one

Describe the solution you'd like

• Use markdown header instead of bold
• keep the system data, but maybe make it smaller
• include a action required/suggested
• Definition of done

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.