old estrela behavior for openend files

cfg/estrela.lua

@@ -6,3 +6,9 @@ local G = ... -- point to the global environment in the script
 G.ide.app.loadfilters.tools = function() return true end
 G.ide.app.loadfilters.specs = function() return true end
 G.ide.app.loadfilters.interpreters = function() return true end
+
+-- this flag means that toggling between projects, will not affect the 
+-- list of openend files (old estrela default). 
+-- zbstudio defaults here to true, meaning that you get 
+-- per-project list of openend files
+projectautoopen = false