android, desktop, ios: show progress indicator after 0.5s

Accepting a request or joining a group usually takes longer than the
previous 1s threshold, so the button looked inert for a second before
anything acknowledged the tap - which is what prompts a second tap.

apps/ios/Shared/Views/Helpers/ViewModifiers.swift

@@ -41,7 +41,7 @@ extension View {
     }
 }
 
-private let progressTimeout: UInt64 = 1_000_000000
+private let progressTimeout: UInt64 = 500_000000
 
 extension Notification.Name {
     static let chatViewWillBeginScrolling = Notification.Name("chatWillBeginScrolling")

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/helpers/ProgressByTimeout.kt

@@ -3,7 +3,7 @@ package chat.simplex.common.views.helpers
 import androidx.compose.runtime.*
 import kotlinx.coroutines.delay
 
-private const val PROGRESS_TIMEOUT_MS = 1000L
+private const val PROGRESS_TIMEOUT_MS = 500L
 
 @Composable
 fun ProgressByTimeoutEffect(inProgress: Boolean, setProgressByTimeout: (Boolean) -> Unit) {