unify margin between different steps

src/view/com/composer/Composer.tsx

@@ -770,6 +770,7 @@ export const ComposePost = observer(function ComposePost({
             ) : null}
             {(videoUploadState.asset || videoUploadState.video) && (
               <Animated.View
+                style={[a.w_full, a.mt_xs]}
                 entering={native(ZoomIn)}
                 exiting={native(ZoomOut)}>
                 {videoUploadState.asset &&

src/view/com/composer/videos/SubtitleDialog.tsx

@@ -34,7 +34,7 @@ export function SubtitleDialogBtn(props: Props) {
   const {_} = useLingui()
 
   return (
-    <View style={[a.flex_row, a.mt_xs]}>
+    <View style={[a.flex_row, a.my_xs]}>
       <Button
         label={isWeb ? _('Captions & alt text') : _('Alt text')}
         accessibilityHint={

src/view/com/composer/videos/VideoTranscodeProgress.tsx

@@ -35,7 +35,6 @@ export function VideoTranscodeProgress({
     <View
       style={[
         a.w_full,
-        a.mt_md,
         t.atoms.bg_contrast_50,
         a.rounded_md,
         a.overflow_hidden,