#1026 Analysis

Fixing issue #1026 is going to require adding a new section in the serial connection tab in settings for a configurable blacklist of gcodes to not uppercase. This blacklist needs to be stored in the settings.py file, talk to the settings.js file, and have a front end widget in the serialconnection.jinja file. We will also need to add a function to match the gcodes inputted by the user against the gcodes in the blacklist. This function may need to be located in the gcodeinterpreter.py file.