Add extra welcome screen margin

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/screens/welcome.tsx

@@ -8,10 +8,10 @@ const WelcomeScreen = (properties: { selectStorageLocation: () => void }) => {
     <PaddedView centered>
       <Text
         variant="displayMedium"
-        style={[styles.marginBottom, styles.centerText]}>
+        style={[styles.bigMarginBottom, styles.centerText]}>
         Welcome to Terminally Online!
       </Text>
-      <Button mode="contained" onPress={properties.selectStorageLocation}>
+      <Button mode="contained" onPress={properties.selectStorageLocation} style={styles.extremeMarginBottom}>
         Select Storage Location
       </Button>
     </PaddedView>