Clean HTML Markup and CSS

Removed comments from li (Is a trick to remove white space, but is fragile. Can easily be displaced by document formatting.). li items on nav menu now are float: left with an adjusted margin
Clean HTML Markup and CSS

Removed comments from li (Is a trick to remove white space, but is fragile. Can easily be displaced by document formatting.). li items on nav menu now are float: left with an adjusted margin
Add functionality to add rows in AddProducts

Added a button to add a new row to the table on the AddProducts page. The new rows are appended to the table.