The viewer doesn't retry to upload baked textures if the initial upload failed

When a bake upload fails, the viewer doesn't retry it, and subsequently doesn't send a AgentSetAppearance message. This can happen without the user being aware, leaving the avatar looking good on their screen, but not updated to the same outfit on other people's screens. The avatar will remain in that state until the user does something that causes a rebake (manually rebake or change outfit.) The solution here is to retry the upload after a small delay.

In my case this is often caused by my flaky ISP causing http uploads to the UploadBakedTexture capability to fail, but I suspect I'm not the only one seeing these kind of failures (either server side or network related).

This is also a problem with 1.23 based viewers (see http://redmine.kokuaviewer.org/issues/672)