Overall structure of the web page, hard-coded values should be replaced with relative values

For instance, the main container (#content) is set to position absolute and top of 24px. Instead it should be relative to the nav-bar and cover the rest of the height, etc. This will eventually fix the main scrollbar.

Edge Case: When there are more than 3-4 windows opened simultaneously (main scrollbar is back). In that case the window container needs to be fixed. It is important that we fix the main container first.