Updating the navigation bar of exhibition page

[kushthedude]

• Included a screenshot showing after and before the changes.
• Included a description of the change below.
• Squashed the commits.

Changes done in this Pull Request

• Fixes Unresponsive navigation bar of exhibition page  #92

Description / Changes

-Updated the navigation bar of 'Exhibition Page'
-Contents on the page dont overlap now with each other
-Preview Link: https://kushthedude.github.io/2019.fossasia.org/exhibition/index.html

Screenshots if any:

Before:

After:

---

[kushthedude]

@mariobehling ,
Sir,Please review this PR.

[pranav1698]

LGTM! Good work @kushthedude

[kushthedude]

@pranav1698 Thanks but still its not merged yet.

[pranav1698]

Wait for @mariobehling to review

[yash-kedia]

u will need to provide a test link (gh-pages) to get merged.

[kushthedude]

@yash-kedia Actually i deleted the forked regarding this issue , Any possible solution you could tell.

[imrrahul]

@kushthedude LGTM !! But please provide the preview link so that it can be reviewed and merged fastly.

[kushthedude]

@imrrahul Not a issue , Here is the link https://kushthedude.github.io/summit/exhibition/index.html
What now?

[mariobehling]

Please resolve conflicts.

[kushthedude]

@mariobehling Sir,
As this Repo was accidentally deleted by me i have created a new PR with no conflicts from the Master branch you can review and check it #105