fix - responsive table header

[erkobridee]

this PR fix the table header miss alignment issue causes when user change the window width size

changes:

• angu-fixed-header-table.js
  • redefine the code flow to window resize event
  • add attribute to change resize code flow and make possible define one width value match with window.innerWidth
  • also refactor the code to be more readable, defining the code in 3 sections:
  • utils
  • directive definition
  • angular directive declaration