Fixed buttons on giveaway page

[AnjumanHasan]

🛠️ Fixes Issue

closes #726

👨‍💻 Changes proposed

1. The buttons on the Giveaway page were not in accordance to the followed yellow theme on other pages. Fixed that issue.
2. Changed the svg to match the theme of the page.

✔️ Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.

📷 Screenshots

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