Inconsistent padding for nested labels

[dkalpakchi]

Describe the bug
After creating a nested label of more than 2 levels, the next nested label (that has the same parent label) messes up the padding of the parent

To Reproduce
For a text a b c d e first label like this [[a [b] c] d e], then attempt to add a new label [[a [b] c] d [e]]. The padding of the outermost label will then be incorrect.

Expected behavior
The padding should be correct

Screenshots

Textinator version
Latest

Desktop (please complete the following information):

• OS: Ubuntu
• Browser: Firefox
• Version: 110