Open UI Product Configurator Changes in JS Files

Dear Experts,

Generally we have below 3 main files related to Product Configurator .

cfgui.js,

cfgclient.js,

cfgpropset.

My queries are

1)Coming to Open UI, when configurator launches , i can see below 2 equalent files are loading, but what about   cfgpropset.js File? Which  is the equalent file for this  cfgpropset.js ?

cfgui.js --------->puicfgui.js

cfgclient.js,----->puicfgclient.js

cfgpropset.js------ ?

2) It looks in 8.1.1.10 puicfgui.js, puicfgclient.js is completly recoded (If observe the code, all the variable declarations are looks like..a,b,c,d instead of meaning full variable names like methodname,grpitem,...). I can see this variable name convention maintained till 8.1.1.9 . But it got suddenly changed in 8.1.1.10 ..is there any specific reason behind this? also if we see this files in 8.1.1.10 its not readable..all the code written in continues lines...hard to read the code for understanding . ( I can see the code is re-written by Oliver in comments). Is there any strong reason behind this recode of these files?