Improve handling of lists

[bwl21]

List bullets should be the same on every level
Possible Depth of list should be more than 3

[bwl21]

%
%http://stackoverflow.com/questions/1935952/maximum-nesting-level-of-lists-in-latex
%
\usepackage{enumitem}
\setlistdepth{9}
\setlist[itemize,1]{label=$$\bullet$$}
\setlist[itemize,2]{label=$$\bullet$$}
\setlist[itemize,3]{label=$$\bullet$$}
\setlist[itemize,4]{label=$$\bullet$$}
\setlist[itemize,5]{label=$$\bullet$$}
\setlist[itemize,6]{label=$$\bullet$$}
\setlist[itemize,7]{label=$$\bullet$$}
\setlist[itemize,8]{label=$$\bullet$$}
\setlist[itemize,9]{label=$$\bullet$$}
\renewlist{itemize}{itemize}{9}