Add some images

[mybearworld]

Add images for:

• expanded-backpack
• middle-click-popup
• opacity-slider
• paint-snap
• pick-colors-from-stage
• share-through-mystuff
• sprite-properties

Update images for:

• hide-project-stats (addon updated)
• message-filters (full coverage of the addon)

[Wjplatformer]

seems ok, but to really show the essence of each addon, the "extended backpack" image should have like a ton of stuff in it, to show that it IS extended. Just a tip, there are other addons like the share from the mystuff, I think it would be more suitable for it to have the title mystuff and a single project shown instead of just 2 words "delete" and "share". Makes it more clearer.

Hope this helps! I can also contribute more images if you ask for them :)

[Wjplatformer]

Mostly should be ok if accepted by SA devs.

[Hans5958]

Related: #4

[Hans5958]

Since I've merged #245 (it came earlier), would you please resolve these conflicts (aka replacing the old with the new or reconsider if needed)? Apologizes.

[mybearworld]

As far as I can tell, sprite-properties was the only conflict - did I miss some?