[libcalamaresui] Provide standardised large font

src/libcalamaresui/utils/CalamaresUtilsGui.cpp

@@ -226,6 +226,15 @@ defaultFont()
 }
 
 
+QFont
+largeFont()
+{
+    QFont f;
+    f.setPointSize( defaultFontSize() + 4 );
+    return f;
+}
+
+
 void
 setDefaultFontSize( int points )
 {

src/libcalamaresui/utils/CalamaresUtilsGui.h

@@ -115,6 +115,7 @@ UIDLLEXPORT void setDefaultFontSize( int points );
 UIDLLEXPORT int defaultFontSize();      // in points
 UIDLLEXPORT int defaultFontHeight();    // in pixels, DPI-specific
 UIDLLEXPORT QFont defaultFont();
+UIDLLEXPORT QFont largeFont();
 UIDLLEXPORT QSize defaultIconSize();
 
 /**