Cleanup / reformatting of "fle_win32_framework.h"

[ruimalheiro]

As the framework was never completed 😂 , there might be some code that can be removed or refactored. Example:

void fle_BaseWindow::test()
{
	static const TCHAR * str = TEXT("WELCOME FLE FRAMEWORKKKKKKKKKK\n");
    OutputDebugString(str);
};

The initial intention was to add the ability of building any kind of widget but since it was never required, maybe there is no point in keeping all the abstraction and instead, simplify the code to just handle the tray menus "properly". This should keep it simple to maintain.

There are also some unhandled errors that can lead to bugs. Example