Add mod website button thing feature widget. It is super effective.

gui/ModEditDialogCommon.cpp

@@ -1,17 +1,40 @@
 #include "ModEditDialogCommon.h"
-
-bool lastfirst (QModelIndexList & list, int & first, int & last)
+#include <QDesktopServices>
+#include <QMessageBox>
+#include <QString>
+#include <QUrl>
+bool lastfirst(QModelIndexList &list, int &first, int &last)
 {
-	if(!list.size())
+	if (!list.size())
 		return false;
 	first = last = list[0].row();
-	for(auto item: list)
+	for (auto item : list)
 	{
 		int row = item.row();
-		if(row < first)
+		if (row < first)
 			first = row;
-		if(row > last)
+		if (row > last)
 			last = row;
 	}
 	return true;
-}
+}
+
+void showWebsiteForMod(QWidget *parentDlg, Mod &m)
+{
+	QString url = m.homeurl();
+	if (url.size())
+	{
+		// catch the cases where the protocol is missing
+		if(!url.startsWith("http"))
+		{
+			url = "http://" + url;
+		}
+		QDesktopServices::openUrl(url);
+	}
+	else
+	{
+		QMessageBox::warning(
+			parentDlg, parentDlg->tr("How sad!"),
+			parentDlg->tr("The mod author didn't provide a website link for this mod."));
+	}
+}