[FR] Align file icons and colors

[tbsbdr]

Problem
Icons and Icon colors are quite different between web and mobile clients. This is particularly noticeable when I e.g. do presentations, see screenshot.

Proposed solution

Align icon style and colors between web and mobile clients.

@felix-schwarz @hosy cc @jesmrec Whats you opinion - do you consider the proposal an improvement?

[jesmrec]

For me, that's a good improvement in terms of product. Just need the new stuff to include, i guess

[hosy]

Yes, I absolutely agree that we should use the same icons across the platform. Where can I find the resources? @tbsbdr

[tbsbdr]

Ok, cool 👍 Please see owncloud/android#4483 (comment) for icon assets. @kulmann and team can provide more details if needed.