Various case and text fixes. (#757)

* Various case and text fixes.

* Update some labels per requested changes.

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Co-authored-by: Ansh <anshnanda10@gmail.com>

src/view/screens/SearchMobile.tsx

@@ -164,7 +164,7 @@ export const SearchScreen = withAuthRequired(
               ) : isInputFocused ? (
                 <View>
                   <Text style={[pal.textLight, styles.searchPrompt]}>
-                    Search for users on the network
+                    Search for users and posts on the network
                   </Text>
                 </View>
               ) : null}