Fix: Add xaxis.range[0]/[1] If Not Exist #335

[yzhaoinuw]

Fix #335.
When xaxis.range[0] and xaxis.range[1] do not exist in relayoutdata after resetting axes, add them separately from xaxis.range if it exists. This way the traces should be updated.

[jonasvdd]

ps. to make it way more easier to review, you should at least add a test with your desired behavior that first fails, then create the fix, and verify whether that test passes :)

[jonasvdd]

However, your issues was well described, and I was able to create the necesarry tests! :)

[jonasvdd]

I think you did not give the maintainers editor access, I will try to fix this on a fork (where I will also perform a rebase to make the testing work)