For icon sizes that fail to load, create them from another icon that
succeeded by resizing it, favoring icons that are the closest and larger
(to reduce pixelation artefacts) and with the closest aspect ratio as the
source of this operation (to be as generic as possible). For example, if
the icon that needs to be created must be 16x16, an 18x18 icon would get
picked over either a 32x32 (it's further from 16x16) or a 15x15 (icons
larger than 16x16 are favored since they're larger than the result, so
smaller icons are only picked if no other available icon is larger).

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45696Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>