Refactor / Rename Label

Eeschema: In a similar way to some code editors (Netbeans etc), it would save a lot of time if one were able to rename *all* label instances of a given name by just renaming one label. Example: I have several nodes labeled as "RB0". I decided I want to call the node "QE0_A". I now need to walk all over the schematic, renaming all instances...It is expected that this feature would only be wanted at schemtic entry time - not after PCB layout has begun. If, however a PCB layout does exist this rename must propagate to PCBNew also. Of course, it would not affect any physical aspect of the PCB as we are talking about net names here.