The zone grouping was only taking into account the first zone for both its duration and width, which was wrong and could cause zones to "disappear" if the first zone of the group was really small.
Grouping now works by taking into account the size of the zone and not the clipped to screen size for grouping decisions, to avoid having zone groups popping at the beginning and end of the window.
In order to have consistent results and avoid popping, we're using the start of the last zone in a group as reference instead of its end. This means that it now includes the zone width, so that we make the same decisions wether we are in considering new zones in the loop or to start grouping zones.
Altogether, this seems to have fixed any zone popping when panning, at the cost of not grouping the first/last zone if it is clipped, which seems to be less of an issue to me.
Namespace shortening was kinda ok for function names produced by MSVC, which
are generally clean looking. However, gcc/clang like to produce function names
which include template arguments, function parameters, return values, etc. In
such cases the old algorithm simply didn't work, because removal of everything
before the last :: could as well happen in midst of function parameters list.
The result was certainly not an usable function name.
With this new approach namespaces are no longer explicitly mentioned and this
functionality is simply called zone name shortening.
The user-selectable options were changed to make the shortening always
enabled, disabled, or to apply as needed. Note that the "as needed" approach
will be dynamic, trying to gradually remove more and more from the name, until
it fits in the requested area.
Current implementation is only the first step into making this work. In this
first step the function parameters are reduced to () and the template
arguments are reduced to <>. This alone greatly improves readability of the
zone names.
The option to reduce namespaces to one letter (i.e. std::tr1::hash would
become s:t:hash) will no longer be present, now or in the future.
