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Per @hishamhm's suggestion. This is UI change only.
In code the class names and symbols still refer them as "modes".

Before:
[Up]Up [Dn]Down [Lt]Left [Rt]Right [Arrow]Confirm [Enter]Delete [Del]Done

After:
[Up]Up [Dn]Down [Lt]Left [Rt]Right [Enter]Confirm [Del]Delete [Esc]Done

This is a work-in-progress, code is currently broken.
(Some actions, and notably, the header, are missing.)

Changes in object model: separate class objects to store vtable. Also, nicer UTF-8 display of big numbers.

Reduces resulting code size.

- add AllCPUsMeter;
- because of that, the new .htoprc is incompatible with previous released versions.