Fix/UI feature fixes

[GAchuzia]

Description

Fixes to UI based on recommendations from @Indecisive613
Sorry I didn't go into more details on all the fixes, but they should all be there!
I also updated the theme to use red instead of black for buttons

Fixes #167

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix/feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.

• Unit tests
• Manual tests
• Linted/formatted

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Indecisive613]

Nice job. Your changes address all the minor UI bugs that were identified.

My only nitpick is now with the capitalization on the various pages (because you have a commit that addresses capitalization).

On Home: Scan food -> Scan Food
On Browse: Browse food -> Browse Food (when no user is logged in this is okay, it's the logged in version that is bad)
Log out button: Log out -> Log Out
Log in button: Log in -> Log In
On Statistics: View other statistics -> View Other Statistics
On Recommendations: Choose another type -> Choose Another Type
On Scan Food: Remove photo -> Remove Photo
On Scan Food: Browse similar -> Browse similar
On Scan Food: Scan another -> Scan Another

Basically check that all buttons with multiple words have all words properly capitalized.

[Indecisive613]

Looks good!