updated users search box & table-responsive

Put the users search box within a input group to look nicer, and wrapped the table within the row, col-12 and table-responsive tags for better mobile usability.

In order to fix the overflow issue in mobile for the tables, we will need to put the side panel on a grid / col combo so the rest of the page falls under that and then use the collapse utility that bootstrap provides to open and close the side nav.

Author: Yohn