Replace template_thumbnail for cassiopeia

[chmst]

Pull Request for Issue #174 .

Summary of Changes

A new screen of the new cassiopeia layout

Testing Instructions

Apply the patch and see the template in the backend

with Preview

Expected result

Actual result

Tumbnail of the first version of cassiopeia

Documentation Changes Required

yes, screenshots.

Note

Designer's Help would be highly appreciated

[brianteeman]

The image is fine but you need to resize and compress it to 640x480
AND create a template_thumbnail.png of 200x150

[richard67]

@chmst If you will change colours in PR #227 e.g. due to review comments, you will have to make new thumbnail images in this PR here, because this PR here shows the colouring resulting from PR #227 .

So I suggest to wait with implementing Brian's comment above until PR #227 is finally merged.

[chmst]

Template thumbnail and template preview added. Help of a designer for better presentation would be highly appreciated.

[brianteeman]

Looks good to me

[richard67]

@brianteeman Is it ok that the new images are 600x400 and 200x142 instead of 640x480 and 200x150? And is it ok that the preview shows a different image than the thumbnail? I'm not sure with that, so I thought maybe I should ask you.

[richard67]

I see Protostar also has different sizes than 640x480 and 200x150 and different images for thumbnail and preview, so that should be ok here, too.

[richard67]

I have tested this PR ✅ with success.

Well done, looks really good.

[richard67]

Thanks!