Add Scroll up Button

[Emuohwo]

Description

Scrolling up a web page is easier when the is a button that does the job. It is common in most websites. The need for this button is obvious when the web page is resized.

Steps to Reproduce

Add the html code in footer.pug
Style it in data-browser-style-main.css and
Add the scroll function in main-view.js
@Nikhil-Vats @AdrianBZG @yochannah Please assign the issue to me.

Expected Behaviour

This button should take a user to the top of the page when it is clicked. Also, This button will appear will the user has scrolled down to a certain height

Actual Behaviour

The button is missing on the page.

Settings

• OS: Window 7

Screenshots

[PrastutiUpadhaya]

@AdrianBZG Can i work on this?

[AdrianBZG]

@PrastutiUpadhaya Sure, go ahead.

[Emuohwo]

@AdrianBZG I've already worked on this issue on my repository and was about to create a pull request for it. I was about to copy the issue number in order to do that only to find out that you've assigned it to @PrastutiUpadhaya. What do you suggest i should do?

[PrastutiUpadhaya]

@AdrianBZG I've already worked on this issue on my repository and was about to create a pull request for it. I was about to copy the issue number in order to do that only to find out that you've assigned it to @PrastutiUpadhaya. What do you suggest i should do?

Hey @Emuohwo it's alright, send the pull request, I had anyway just started working so it's cool I will work on some other issue :)