Font/Pango Text: add extra stroke to text outline to compensate for alpha weirdness

Also added the outline to the hash.

src/font/text.cpp

@@ -690,10 +690,6 @@ void pango_text::render(PangoLayout& layout, const PangoRectangle& rect, const s
 	);
 
 	pango_cairo_show_layout(cr.get(), &layout);
-
-	// HACK: 'draw' text a second time in order to get desired output when copying w/ alpha blending.
-	// See bug #1744 for more info.
-	pango_cairo_show_layout(cr.get(), &layout);
 }
 
 void pango_text::rerender(const bool force)
@@ -925,6 +921,7 @@ size_t hash<font::pango_text>::operator()(const font::pango_text& t) const
 	hash_combine(hash, t.maximum_height_);
 	hash_combine(hash, t.alignment_);
 	hash_combine(hash, t.ellipse_mode_);
+	hash_combine(hash, t.add_outline_);
 
 	return hash;
 }

src/font/text.hpp

@@ -274,7 +274,6 @@ private:
 	/** The SDL surface to render upon used as a cache. */
 	mutable surface surface_;
 
-
 	/** The text to draw (stored as UTF-8). */
 	std::string text_;