Implement differing byte search

[agarmash]

This PR implements a neat little feature I missed - the ability to jump to the next/previous differing byte, skipping the chunk of repeating bytes. Very useful when you analyze a raw flash dump and want to skip the large sections of 0x00s/0xFFs.

Some implementation details worth validating:

• I wasn't sure what is the correct place to put the new menu entries into. The possible candidates were File -> Go to address... and Edit -> Follow selection. I chose the former, although the latter may be a better fit since it already states that the action is related to the selection. Overall, it may be a good moment to refine these menu entries in general.
• I didn't add any tests since I'm not sure what is the project's policy for those. Please let me know if I need to add some!
• I added the machine-generated translations for the new menu entries which may be considered a questionable thing. Please let me know if you're unhappy with those, I'll drop the commit.

Also, thanks for such a nice tool, I use it a lot and was glad to build a new feature for it!