Fix web home feed sizing and related issues (close #432) (#475)

* Fix web home feed sizing (close #432)

* Fix lint

* Fix positioning of profile not found error

* Fix load latest on mobile

* Fix overflow issues on mobile web (visible in postthread)

* Fix bottom pad on mobile web

* Remove old comment

src/lib/styles.ts

@@ -1,5 +1,6 @@
 import {StyleProp, StyleSheet, TextStyle} from 'react-native'
 import {Theme, TypographyVariant} from './ThemeContext'
+import {isMobileWeb} from 'platform/detection'
 
 // 1 is lightest, 2 is light, 3 is mid, 4 is dark, 5 is darkest
 export const colors = {
@@ -162,7 +163,7 @@ export const s = StyleSheet.create({
   // dimensions
   w100pct: {width: '100%'},
   h100pct: {height: '100%'},
-  hContentRegion: {height: '100%'},
+  hContentRegion: isMobileWeb ? {flex: 1} : {height: '100%'},
 
   // text align
   textLeft: {textAlign: 'left'},