Add Missing XUI C++ Files

Minecraft.Client/Common/XUI/XUI_Ctrl_ProgressCtrlBase.h

@@ -0,0 +1,11 @@
+#pragma once
+
+class CXuiCtrlProgressCtrlBase : public CXuiProgressBar, public CXuiElementImplBase
+{
+public:
+	HRESULT OnGetSourceDataText(XUIMessageGetSourceText *pGetSourceTextData, BOOL& bHandled);
+
+	// Override these in the derived classes to return the values to be displayed on the control
+	virtual int GetValue() = 0;
+	virtual void GetRange(int *pnRangeMin, int *pnRangeMax) = 0;
+};