Removing the window resizing and updating ps title

I've remove the window resizing and also updated the window title to the following ```$pswindow.windowtitle = ('ASP.NET vNext: {0} {1}' -f $args[0], $args[1])```. So the result is ```ASP.NET vNext: k web``` for k web.

@shirhatti can you make the same change for other prompts?