As website visitor I want the community logos look homogenous to not get confused by all the colors and sizes.

[ohnewein]

The appearance of the community logos should look homogeneous.

Mainly on https://opendatahub.com/community/ and the slide show on frontpage.

• All logos should be grayscale. Images should by in grayscale, but when there is a mouse over the colors should be shown.
• All logos should have similar sizes
• Sorting of logo companies/organizations should be in alpahbetical order (is already)