Community Wishlist Survey 2017/Multimedia and Commons/Fix Gallery slideshow

Fix Gallery slideshow

Problem: The slideshow option of the gallery-tag has some bugs that basically prevent it from being usable.

Proposed solution: Fix these 4 annoying bugs:
- Slideshow is sometime completely different in edit preview than on saved page - phab:T151471
- You can't specify the size of the images (heights and weights parameters are ignored) - phab:T154013 (VE)
- The images are often slightly sharp
- Images sometime don't fully load but stay extremely blurry.

@MichaelSchoenitzer: Could you add links to any existing phabricator tasks, for these issues? or create new tasks that give details on each problem. Thanks! (We discourage abstract "fix all the things with X" proposals, but I think a limited and specific list like this one might be ok.) Quiddity (WMF) (talk) 19:51, 17 November 2017 (UTC)[reply]

Support MichaelSchoenitzer (talk) 19:11, 27 November 2017 (UTC)[reply]
Support Strainu (talk) 23:09, 27 November 2017 (UTC)[reply]
Support --Liuxinyu970226 (talk) 13:17, 28 November 2017 (UTC)[reply]
Support Thomas Obermair 4 (talk) 23:00, 28 November 2017 (UTC)[reply]
Support Donald Trung (Talk 🤳🏻) (My global lock 🔒) (My global unlock 🔓) 11:00, 29 November 2017 (UTC)[reply]
Support Dromedar61 (talk) 21:24, 30 November 2017 (UTC)[reply]
Support Moxmarco (talk) 11:43, 1 December 2017 (UTC)[reply]
Support Theklan (talk) 18:49, 1 December 2017 (UTC)[reply]
Support core propoal, support phab:T179918 as option but not as default, oppose phab:T181470. X:: black ::X (talk) 15:22, 10 December 2017 (UTC), updated 09:11, 11 December 2017 (UTC)[reply]