Gamepad axis deadzone while binding

The deadzones for axes ("float controls") currently only applies when calculating virtual input. A separate deadzone, hardcoded in the input method, is applied when using the binding dialogs. A "global" deadzone should be added to the bottom of Config > Controllers... and Config > Hotkeys....

until then, here's a Lua script for debugging gamepads when a "host deadzone" is desperately needed

local WINDOW = 100;

local concat_names = function(list)
	local s = "";
	local l = "";
	for k, _ in pairs(list) do
		l = l..k.."   ";
		if #l > 60 then
			s = s..l.."\n";
			l = "";
		end
	end
	return s..l;
end;

local held = {};
local held_str = "";
while true do
	for k, v in pairs(input.get()) do held[k] = v; end
	if emu.framecount() % WINDOW == 0 then
		held_str = concat_names(held);
		held = {};
	end
	gui.text(0, 0, held_str, nil, "bottomleft");
	emu.frameadvance();
end

see also my notes #27, my notes #145

Start with the input method's hardcoded binding-dialog deadzone and the Config > Controllers... and Config > Hotkeys... dialogs. Confirm the global setting is applied to axis binding while preserving the existing virtual-input deadzone behavior; done when both dialogs expose the setting and binding no longer uses a separate hardcoded value.