Slew of minor style adjustments

- Added padding to bottom of /setup-guide to accomodate iPhone users with curved screen bottoms
- Added screen orientation detection to /player-settings to force select inputs into a single column on mobile devices
- Added an X to the cookie notice to indicate it can be closed
- Changed "Generate Game" to "Start Game" so it matches the header

WebHostLib/static/assets/cookieNotice.js

@@ -5,6 +5,10 @@ window.addEventListener('load', () => {
     const cookieNotice = document.createElement('div');
     cookieNotice.innerText = "This website uses cookies to store information about the games you play.";
     cookieNotice.setAttribute('id', 'cookie-notice');
+    const closeButton = document.createElement('span');
+    closeButton.setAttribute('id', 'close-button');
+    closeButton.innerText = 'X';
+    cookieNotice.appendChild(closeButton);
     document.body.appendChild(cookieNotice);
     cookieNotice.addEventListener('click', () => {
         localStorage.setItem('cookieNotice', "1");