Issue #550 leads to incorrect height

Hi,

My TOC style got messed up (h3 h4 h5 stacked up due to wrong height) after updating to 2.0.53 probably because every element is now having a dynamic generated “height” when activated, and the height is not correct. This may be introduced by https://github.com/ahmedkaludi/Easy-Table-of-Contents/commit/1aaa8caf81177c7c29adbecc2403f6f58fd98c73 . Thank you!