Only poll feed when feed page is focused (#2064)

* Do no poll when screen is not focused

* Avoid polling unless focused

* Handle homepage in background

* Fix the intl:check to ignore comments in diffs

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Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/view/screens/Profile.tsx

@@ -420,6 +420,7 @@ const FeedSection = React.forwardRef<SectionRef, FeedSectionProps>(
       <View>
         <Feed
           testID="postsFeed"
+          enabled={isFocused}
           feed={feed}
           pollInterval={30e3}
           scrollElRef={scrollElRef}
@@ -428,7 +429,6 @@ const FeedSection = React.forwardRef<SectionRef, FeedSectionProps>(
           scrollEventThrottle={1}
           renderEmptyState={renderPostsEmpty}
           headerOffset={headerHeight}
-          enabled={isFocused}
         />
         {(isScrolledDown || hasNew) && (
           <LoadLatestBtn