Option to delete all trips in history

[efb4f5ff-1298-471a-8973-3d47447115dc]

Acknowledgments
Please check the following boxes with an x if they apply:

• The feature I want to propose would be useful for the majority of users, not only for me personally.
• I am aware that Transportr is mostly developed by one person in their unpaid spare time.
• I can help myself to get this feature implemented or know someone who wants to do it.
• If I want to add support for a new region or country, I checked that this is already available in public-transport-enabler and know the process described on the Transportr homepage.

Is your feature request related to a problem? Please describe.
At the moment u have to delete trips in history one by one if u want to delete them all.

Describe the solution you'd like
A option in the settings? To delete all trips in history

Describe alternatives you've considered
None

Additional context
None