android, desktop: small layout changes (#4643)

* android, desktop: small layout changes

* padding

* blue theme handling

* themedBackground on onboarding

* status bar in call

* disabled elevation on attachments sheet to prevent seeing shadow from the bottom

---------

Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/chatlist/ChatListView.android.kt

@@ -64,6 +64,9 @@ actual fun ActiveCallInteractiveArea(call: Call) {
   }
 }
 
+// Temporary solution for storing a color that needs to be applied after call ends
+var statusBarColorAfterCall = mutableIntStateOf(CurrentColors.value.colors.background.toArgb())
+
 @Composable
 private fun GreenLine(call: Call) {
   Row(
@@ -81,9 +84,10 @@ private fun GreenLine(call: Call) {
   }
   val window = (LocalContext.current as Activity).window
   DisposableEffect(Unit) {
+    statusBarColorAfterCall.intValue = window.statusBarColor
     window.statusBarColor = SimplexGreen.toArgb()
     onDispose {
-      window.statusBarColor = Color.Black.toArgb()
+      window.statusBarColor = statusBarColorAfterCall.intValue
     }
   }
 }