Named INPUT_FLAG_1 to INPUT_FLAG_DROPDOWN_STAY_OPEN
Named INPUT_FLAG_2 to INPUT_FLAG_DROPDOWN_MOUSE_UP
placed RCT2_ADDRESS_INPUT_FLAGS where valid and replaced all bitwise
references to it with appropriate input flags.
Changed ride view dropdown to hold only as it should be.
Noticed a bug that was causing path bits to fail to be changed.
Reduced compile warnings by using ints for coordinates.
Rearanged colour picker to stop bug that prevents its use when first clicked.
