Decreased font size for source code editor, embedded fonts, tab headers now use relative position to make code editor move down, when too much tabs were opened(and if they can't fit in width of window, show IDE window only after page load, closing tabs now should work, added Tooltips for tab headers to show path of opened file, allow for closing all tabs, if all tabs closed, then source code editor will be hidden, removed sample source code from html, now it will load IDE source code.