dConsole: add support for pasting from system clipboard.
Add support for copying last result and copying/manipulating current command.
Copying inside Eigenmath works fine - for example: you can copy the last result and use it later inside Eigenmath, without any loss of meaning.
Unfortunately, the OS and Eigenmath have mutual incompatibilities in the expression format, which means that it's not simple to copy from Eigenmath to e.g. Run-Mat, and vice-versa. However, for numeric values it should be fine.
Reorganize UI. Instead of sitting in random keys and commands, most port-specific functions are now accessible through the Shift+Menu key.
Remove from fkey menu functions that are now available with Shift+Menu, leaving more keys available for user functions.