Shift addition of menuselectify class to master-dashboard.jade

[sohailrajdev97]

We are using the following code in every jade file for portals to highlight the current portal in navigation sidebar.

document.getElementsByClassName('mdl-navigation__link menuselectify')[0].classList.remove('menuselectify');
document.getElementById('XXXXX').classList.add('menuselectify');

Shift this code to the master template master-dashboard.jade so that the currently opened portal is automatically highlighted in the sidebar without explicitly programming it in every jade file.

Also, after the code has been shifted, remove all it's occurrences from all jade files.

[sohailrajdev97]

Resolved by #40