Do not hide config options that are configured without source

Instead highlight them in red to let user know its an error.

Closes #4407
Closes #4468
Closes #1945

Signed-off-by: Tomas Slusny <ts6234@intl.att.com>

Author: Tomas Slusny

src/Classes/ConfigTab.lua

@@ -250,6 +250,21 @@ local ConfigTabClass = newClass("ConfigTab", "UndoHandler", "ControlHost", "Cont
 					control.selIndex = varData.defaultIndex
 				end
 			end
+
+			local innerShown = control.shown
+			control.shown = function()
+				local shown = type(innerShown) == "boolean" and innerShown or innerShown()
+				return not shown and control.state ~= self:GetDefaultState(varData.var, type(control.state)) or shown
+			end
+			local innerLabel = control.label
+			control.label = function()
+				local shown = type(innerShown) == "boolean" and innerShown or innerShown()
+				if not shown and control.state ~= self:GetDefaultState(varData.var, type(control.state)) then
+					return "^1"..innerLabel
+				end
+				return innerLabel
+			end
+
 			t_insert(self.controls, control)
 			t_insert(lastSection.varControlList, control)
 		end