Fixes in floating dates with migrated histories.

All service messages are now not multiline (including pinned).
Confirmation for profile photo deleting will be added (not enabled).
Copy-by-selection should be supported in Linux version now.
Drafts that contain only reply-to-id (without text) support added.

Telegram/SourceFiles/app.cpp

@@ -84,7 +84,12 @@ namespace {
 	typedef QMap<uint64, QPair<PeerId, QString> > SentData;
 	SentData sentData;
 
-	HistoryItem *hoveredItem = 0, *pressedItem = 0, *hoveredLinkItem = 0, *pressedLinkItem = 0, *contextItem = 0, *mousedItem = 0;
+	HistoryItem *hoveredItem = nullptr,
+		*pressedItem = nullptr,
+		*hoveredLinkItem = nullptr,
+		*pressedLinkItem = nullptr,
+		*contextItem = nullptr,
+		*mousedItem = nullptr;
 
 	QPixmap *emoji = 0, *emojiLarge = 0;
 	style::font monofont;
@@ -1938,7 +1943,7 @@ namespace {
 			delete toDelete[i];
 		}
 
-		::hoveredItem = ::pressedItem = ::hoveredLinkItem = ::pressedLinkItem = ::contextItem = 0;
+		clearMousedItems();
 	}
 
 	void historyClearItems() {
@@ -2213,6 +2218,15 @@ namespace {
 		return ::mousedItem;
 	}
 
+	void clearMousedItems() {
+		hoveredItem(nullptr);
+		pressedItem(nullptr);
+		hoveredLinkItem(nullptr);
+		pressedLinkItem(nullptr);
+		contextItem(nullptr);
+		mousedItem(nullptr);
+	}
+
 	const style::font &monofont() {
 		return ::monofont;
 	}