Made some changes in contrib module , which is no one get a option
 1. "create a poll"
 2. "list event"

except administor or content moderator
but if any user enter a url of any above then he/she get that page
Made some change in contrib module , which is add a line of if codition (like:- if(isset(variable)))
because it may occur error
Made some changes in css file just change some color in green-orange palette (custom palette)
Add a css file name custom.css , which contain css property to remove error , add custom property