suggestion: new menu styles for keys

[ffasbend]

Suggestion to add more styles for keys, e.g.:

• keys with rounded border, but '+' is not printed
• keys with no border and no '+'

% create new menustyle styles (used for keys)
% - roundedkeyscondensed: no '+' between keys
\copymenustyle{roundedkeyscondensed}{roundedkeys}
\changemenuelement{roundedkeyscondensed}{sep}{%
	\hspace{0.2em plus 0.1em minus 0.05em}%
}
% - nobordercondensed: no border around keys, and no '+' between keys
\copymenustyle{nobordercondensed}{paths}
\changemenuelement{nobordercondensed}{pre}{%
	\hspace{0.2em plus 0.1em}%
}
\changemenuelement{nobordercondensed}{sep}{%
	\hspace{0.2em plus 0.1em}%
}

% replace \keys with borderless condensed version
\renewmenumacro{\keys}[+]{nobordercondensed}
% create new menu macro \keysb (orginal style with border and '+' between keys) 
\newmenumacro{\keysb}[+]{roundedkeys}
% create new menu macro \keysbc (orginal style with border but no '+' between keys) 
\newmenumacro{\keysbc}[+]{roundedkeyscondensed}