Add "no grouping" mode to find zone zones list.

server/TracyView.hpp

@@ -363,7 +363,7 @@ private:
 
     struct FindZone {
         enum : uint64_t { Unselected = std::numeric_limits<uint64_t>::max() - 1 };
-        enum class GroupBy : int { Thread, UserText, Callstack };
+        enum class GroupBy : int { Thread, UserText, Callstack, NoGrouping };
         enum class SortBy : int { Order, Count, Time, Mtpc };
         enum class TableSortBy : int { Starttime, Runtime, Name };