UserPicker: add top spacer above active profile card and tighten its left padding

Card was flush against the sheet's top edge; add DEFAULT_PADDING spacer above. Left padding inside the card was 16dp while the avatar (60dp) sat in an 80dp minHeight row so visual top/bottom were ~10dp — bring start down to 10dp so the photo sits equidistant from card top, bottom and left.

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/UserPicker.kt

@@ -212,8 +212,9 @@ fun UserPicker(
           )
         }
       } else if (currentUser != null) {
+        Spacer(Modifier.height(DEFAULT_PADDING))
         SectionView {
-          SectionItemView({ onUserClicked(currentUser) }, 80.dp, padding = PaddingValues(start = 16.dp, end = DEFAULT_PADDING), disabled = stopped) {
+          SectionItemView({ onUserClicked(currentUser) }, 80.dp, padding = PaddingValues(start = 10.dp, end = DEFAULT_PADDING), disabled = stopped) {
             ProfilePreview(currentUser.profile, iconColor = iconColor, stopped = stopped)
           }
         }