UI: Dark mode should make the entire page dark

[sovoid]

On toggling dark mode, there seems to be a white strip on mobile view that doesnt turn dark. This needs to be fixed

[agarwalrounak]

I think this is related to #7. I haven't checked it on mobile but the reason should be the same.

[NidhiKJha]

@agarwalrounak so there is a padding in the bottom that is left white even when the user toggles to the dark mode. So, this is kind of similar but a different issue. Here we want to get rid of this bottom white padding.

[NidhiKJha]

@Tanmayi03 You can start working on it. Let us know if you need any help.