Merge as duplicate #5
Description
Add ability to merge multiple log entries under single issue.
Sometimes two different error logs are symptom of the same problem, or are even identical. For example, if line inside file changes, new error log entry can be created because of this:
Undefined index 'whatever' in /classes/Tools.php:4560
Undefined index 'whatever' in /classes/Tools.php:4567
We should be able to merge these two instances and track them together under single issue.