App Configurations
Threaded Comments can be configured by visiting Manage Apps section in JIRA.
Following configurations:
Threaded Comments:
Tick to enable thread comments for all projects in JIRA
Untick allow you to select which projects you want to enabled
Like/dislike Comments:
Tick to enable like/dislike feature for all projects in JIRA
Untick allow you to select which projects you want to enabled
Click Save to apply the configurations.