fix: fixed feedback widget position issue

[sundasnoreen12]

INF-817

Description

We need to move the feedback button towards the bottom right in the Discussion tab and in the sidebar to avoid overlap with post content and summary, respectively. As of now, it overlaps with post summary/content.

Screenshots/sandbox (optional):

Include a link to the sandbox for design changes or screenshot for before and after. Remove this section if it's not applicable.

Before	After

Merge Checklist

• [ ] If your update includes visual changes, have they been reviewed by a designer? Send them a link to the Sandbox, if applicable.
• [ ] Is there adequate test coverage for your changes?

Post-merge Checklist

• [ ] Deploy the changes to prod after verifying on stage or ask @openedx/edx-infinity to do it.
• [ ] 🎉 🙌 Celebrate! Thanks for your contribution.

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (f13b34c) 92.15% compared to head (925135b) 92.15%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #499 +/- ## ======================================= Coverage 92.15% 92.15% ======================================= Files 163 163 Lines 3251 3251 Branches 889 889 ======================================= Hits 2996 2996 Misses 236 236 Partials 19 19 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openedx)

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