Add "Send when online" to the send button context menu.

Telegram/SourceFiles/api/api_common.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "api/api_common.h"
 
+#include "base/qt/qt_key_modifiers.h"
 #include "data/data_thread.h"
 
 namespace Api {
@@ -20,4 +21,11 @@ SendAction::SendAction(
 , topicRootId(replyTo) {
 }
 
+SendOptions DefaultSendWhenOnlineOptions() {
+	return {
+		.scheduled = kScheduledUntilOnlineTimestamp,
+		.silent = base::IsCtrlPressed(),
+	};
+}
+
 } // namespace Api

Telegram/SourceFiles/api/api_common.h

@@ -15,6 +15,8 @@ class Thread;
 
 namespace Api {
 
+inline constexpr auto kScheduledUntilOnlineTimestamp = TimeId(0x7FFFFFFE);
+
 struct SendOptions {
 	PeerData *sendAs = nullptr;
 	TimeId scheduled = 0;
@@ -23,6 +25,7 @@ struct SendOptions {
 	bool removeWebPageId = false;
 	bool hideViaBot = false;
 };
+[[nodiscard]] SendOptions DefaultSendWhenOnlineOptions();
 
 enum class SendType {
 	Normal,