User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
Steps to reproduce:
This morning Thunderbird update from 68.(???).. to 78.2.2 (32-bit). Everything appears to be working fine except when I try to use Tools | Message Filters | Edit a filter with a large number of existing entries I get (Not Responding). It eventually does come in focus, but as soon as try to do something it again says (Not Responding). Because this particular filter has many items, it was slow to initiate with the older version, but would let me make entries. The new version is for all practical purpose not allowing me to make changes.
(Not Responding) with each attempt to make a change.
My assumption is that the new version has some limit that I have surpassed. If this limit cannot be increased, Is there a tool to help me split the existing Filter into smaller parts as it represents several years of entries?