Change default theme
Current Spark's default theme (JTattoo Luna - XP) looks dated and ugly (reminds Windows XP). We should evaluate an option of having a native feel and look as default one (if it looks ok) or consider some other theme as default. JTattoo all skins look ugly in my opinion, so i would vote for one of the mildly colored Substance variants like Moderate or Business Blue Steel. Blue Steel looks better in my opinion because of consistent coloring of titlebars and toolbars with one pastel color.