ColorPicker: Made rendering aware of global style alpha of the picker can be faded out. (#2711)

Note that some elements won't accurately fade down with the same intensity, and the color wheel when enabled will have small overlap glitches with (style.Alpha < 1.0).

imgui.cpp

@@ -4439,7 +4439,7 @@ bool ImGui::IsMouseDoubleClicked(int button)
     return g.IO.MouseDoubleClicked[button];
 }
 
-// [Internal] This doesn't test if the button is presed
+// [Internal] This doesn't test if the button is pressed
 bool ImGui::IsMouseDragPastThreshold(int button, float lock_threshold)
 {
     ImGuiContext& g = *GImGui;