* add floating point value box
* remove upper and lower bound
* remove enum entry for float value box
* fix code to match coding conventions
* fix code to match coding conventions
* change variable name
When trying to use the floating window example, I got several times some crashes when expanding the window size.
It's caused in the GuiScrollBar function, when the maxValue is equal to the minValue (I don't know if this case is intended in the first place).
Because valueRange variable is maxValue minus minValue, then it is equal to 0, and triggers a crash later, when we use it in division (division by 0).
I'm not sure if it's the best fix, maybe minValue == maxValue is not indentend in the first place and we should fix this problem earlier?
* add floating window example
A reusable floating window function. Window can be moved around through its title bar, minimized with its close button, resized from the icon in the lower right. The window is kept within the application area if the user pushes it outside the window/screen. The contents of the window are clipped with `BeginScissorMode` only if required and also a `GuiScrollPanel` enables user to see the clipped content of the window if current window size does not encapsulate all the content.
* modify to add ability to create multiple windows
* formatting for pointer dereference style consistency
