Please give a link underneath a new issue that allows to add a issue that needs the current one to be resolved.
E.g. : You created issue "
#1 persistence" and with that you can do other things or want to extend that in " #2 sql" or " #3 cache". So in that case a link underneath the issue (among "Actions") would be great to have (like: "Create accessory issue").
The new one could be automatically a one step lower priority for the same component, milestone and version. This will keep it intuitive and simple for end-users.
In addition a text could be added that just says "blocked by #..." or even is the beginning of an easy way to having issues blocking each other and keeping it simple and stupid.
Some very late extension could be to give a generated tree view of the issues.