Control value config

[Ryanc13]

added values string to the controls struct to allow for the configuration of min/max values of Value boxes, spinners, sliders, slider bars and progress bars (not sure if this even makes sense but what ever just in case someone wants it).

set the default key bind to edit the values to V, the string is delimited by ; similar to the text in combo boxes.

updated the file version number and version number (not sure if this is wanted)

[Ryanc13]

Most likely will add upgrading from 4.0 > 4.1 file versions in the LoadLayout function. Will also look into moving the combo box entry definitions to values so that they can have labels.

Added this functionality to make editing larger layouts more economical so I don't have to keep editing these ranges after an export.

[raysan5]

@Ryanc13 Hi! Excuse the late response! What is the state of this PR?