Fix working with layers.

Regression was introduced in df64c97.

New base::flags work correctly only if all mutually exclusive flag
values use mutually exclusive bits (a & b == 0 for exclusive (a, b)).

Closes #3856.

Telegram/SourceFiles/dialogs/dialogs_inner_widget.h

@@ -175,11 +175,11 @@ private:
 
 	void itemRemoved(HistoryItem *item);
 	enum class UpdateRowSection {
-		Default = 0x01,
-		Filtered = 0x02,
-		PeerSearch = 0x04,
-		MessageSearch = 0x08,
-		All = 0x0F,
+		Default       = (1 << 0),
+		Filtered      = (1 << 1),
+		PeerSearch    = (1 << 2),
+		MessageSearch = (1 << 3),
+		All           = Default | Filtered | PeerSearch | MessageSearch,
 	};
 	using UpdateRowSections = base::flags<UpdateRowSection>;
 	friend inline constexpr auto is_flag_type(UpdateRowSection) { return true; };