Add a scripting ability to cTrader, editable in cAlgo, for single-pass tasks

There's is a need to add the abilty for cTrader to execute single-pass tasks which is not currently supported. In MT4 this is done via a Scripting mechanism. For example, say you have 16 charts open and you make a change to one of them and save it as a template. Now you'd like to apply this template to all open charts. A script can easily do this in one pass, accessing each chart's child window and applying the specified template. Another, simpler example would be to run a script to change all open charts to a specific timeframe, chart type, what have you.