ui: Fixes in project wizzard

* stretch at end of preferences
* space at scrollbar
* default font size
* only refresh project when something changed
* fixed sizing of text fields
* icons fit to font size
* use em base sizes
* added language to project type label

src/lib/Project.h

@@ -17,7 +17,9 @@ public:
 
 	~Project();
 
-	bool load(const FilePath& projectSettingsFile, bool forceRefresh);
+	const FilePath& getProjectSettingsFilePath() const;
+
+	bool load(const FilePath& projectSettingsFile);
 	bool save(const FilePath& projectSettingsFile);
 	void reload();