Add Canvas Icon and Description to Kibana Home

[alexfrancoeur]

We'll need to add a Canvas icon and description to Kibana Home under the visualize section. Given the limited amount of real estate we have, I was thinking we could take the place of the Timelion card for now. We'd like to redesign in the future.

@gchaps do you think you could help with a quick one liner about Canvas?

cc: @rashidkpc @w33ble

[gchaps]

@alexfrancoeur, @rashidkpc, and I agreed on this text:

Showcase your data in a pixel-perfect way.

[alexfrancoeur]

@rashidkpc @w33ble @ryankeairns @cqliu1 @clintandrewhall @monfera can any one of you replace the Timelion card with the Canvas card on the homepage for 6.5? The feature directory should have both, but we'd like to emphasize Canvas more over other UI's. The icon should be in EUI and the description is listed in the comment above.

[cqliu1]

@alexfrancoeur I'll do it

[alexfrancoeur]

thanks @cqliu1!