fix styling

src/components/thread/Thread.jsx

src/components/utility/Navbar.jsx

src/styles/App.css

src/styles/LoginForm.css

src/styles/Search.css

src/styles/profile/Profile.css

src/styles/thread/Form.css

src/styles/thread/ListThreads.css

src/styles/thread/Thread.css

src/styles/topic/Topic.css

src/styles/topic/TopicList.css

src/styles/utility/Footer.css