Fixed CInterface::SetFocus not recursing into windows, this fixes highlighting of compilation errors in the editor

It's not really nice, but at least it works

src/ui/controls/control.cpp

@@ -281,9 +281,10 @@ bool CControl::GetTooltip(Math::Point pos, std::string &name)
 
 // Management of the focus.
 
-void CControl::SetFocus(bool bFocus)
+void CControl::SetFocus(CControl* focusControl)
 {
-    m_bFocus = bFocus;
+    // TODO: I don't like this, but it's needed for Ui::CWindow* to work properly
+    m_bFocus = focusControl == this;
 }
 
 bool CControl::GetFocus()

src/ui/controls/control.h

@@ -94,7 +94,7 @@ public:
     virtual Gfx::FontType GetFontType();
     virtual bool          SetTooltip(std::string name);
     virtual bool          GetTooltip(Math::Point pos, std::string &name);
-    virtual void          SetFocus(bool bFocus);
+    virtual void          SetFocus(CControl* focusControl);
     virtual bool          GetFocus();
 
     virtual EventType     GetEventType();

src/ui/controls/interface.cpp

@@ -335,8 +335,7 @@ void CInterface::SetFocus(CControl* focusControl)
     {
         if (control != nullptr)
         {
-            bool focus = control.get() == focusControl;
-            control->SetFocus(focus);
+            control->SetFocus(focusControl);
         }
     }
 }

src/ui/controls/window.cpp

@@ -1283,4 +1283,15 @@ void CWindow::DrawHach(Math::Point pos, Math::Point dim)
     while ( !bStop );
 }
 
+void CWindow::SetFocus(CControl* focusControl)
+{
+    for (auto& control : m_controls)
+    {
+        if (control != nullptr)
+        {
+            control->SetFocus(focusControl);
+        }
+    }
+}
+
 }

src/ui/controls/window.h

@@ -114,6 +114,8 @@ public:
 
     void        Draw() override;
 
+    void        SetFocus(CControl* focusControl) override;
+
 protected:
     int         BorderDetect(Math::Point pos);
     void        AdjustButtons();