Add Gwenview ditch the rest

[bashhelp]

Add Gwenview ditch the rest of the image viewers. We don't need like 4 different image viewers.

Gwenview by far is much better than Kuickview. Gwenview renders the pictures smoothly in any size. Kuickview leaves that jagged lines and pixelly images.

[Erick90022]

Thats one way but i am not sure if it will work with every option.