Fix sprite and picking examples

[Jondolf]

Objective

Looks like #15489 broke some examples :) And there are some other issues as well.

Gabe's brother Gabe is tiny in the sprite_animation example:

Gabe is not running in the sprite_picking example, and (unrelated) is also very blurry: (note that the screenshot is a bit zoomed in)

Unrelated to sprites, the text in the simple_picking example is way too dark when hovered:

Solution

Both Gabes are now the correct size:

Gabe is crisp and running:

The text has better contrast: