Address manager

We have to juggle addresses all the time, lots of them are shared between tools, and they mostly have the same structure around them: domain, length, name, description, etc.

I think it would be better to have a uniform format for addresses in general (json?), and to reuse the whole list in the tools that need it: ram watch, ram search, hex editor bookmarks, symbolic trace-logging (whenever we have it), etc. The format would include flags representing which tools want this address.

This also includes having a dialog that just edits those addresses, and possibly converts to and from the new format, until all tools support it.

edit: a watch is similar to what a cheat needs, but not precisely, consider refactoring to not even have [a separate Watch class] --adelikat

edit: see also #677

Start by reviewing the existing ram watch, ram search, hex editor bookmarks, symbolic trace-logging, and separate Watch class mentioned in the issue, along with related issue #677. Determine how these tools currently represent addresses and whether a shared format and editing dialog can cover them; done would mean a decided design and coordinated support across the listed tools.