Stripe payments + QoL update

[mvaessen]

Some of you might have already noticed I deployed this update last Friday. So here is the official announcement!

Stripe

One of the most requested suggestions was adding more payment providers, for the community website shop. Stripe is used by many webshops and is well known for their excellent dashboard.
You can find all payment options for Stripe here: https://stripe.com/docs/payments/payment-methods/overview

QoL update

• Improved contrast and framework in the main sidebar navigation.
• Added shortcuts to Clusters and Config template groups in the sidebar
• Various UI tweaks to make the dashboard a bit more compact, allow to fit more stuff on the screen.
• Moved "Custom Roles" to the Admin tools section, in the sidebar navigation.
• Added invisible improvements for the upcoming Dynamic Dashboard update.