Improve trace saving experience.

This adds additional dialog, which allows selection of compression mode. Also,
when a trace cannot be saved, a failure popup will be displayed.

server/TracyView.hpp

@@ -12,6 +12,7 @@
 #include "TracyBadVersion.hpp"
 #include "TracyBuzzAnim.hpp"
 #include "TracyDecayValue.hpp"
+#include "TracyFileWrite.hpp"
 #include "TracyImGui.hpp"
 #include "TracyShortPtr.hpp"
 #include "TracySourceContents.hpp"
@@ -282,6 +283,7 @@ private:
     void CalcZoneTimeDataImpl( const V& children, const ContextSwitch* ctx, unordered_flat_map<int16_t, ZoneTimeData>& data, int64_t& ztime, const ZoneEvent& zone );
 
     void SetPlaybackFrame( uint32_t idx );
+    bool Save( const char* fn, FileWrite::Compression comp, int zlevel );
 
     unordered_flat_map<const void*, VisData> m_visData;
     unordered_flat_map<uint64_t, bool> m_visibleMsgThread;
@@ -323,7 +325,7 @@ private:
     void AdjustThreadHeight( View::VisData& vis, int oldOffset, int& offset );
 
     Worker m_worker;
-    std::string m_filename;
+    std::string m_filename, m_filenameStaging;
     bool m_staticView;
     ViewMode m_viewMode;
     bool m_viewModeHeuristicTry = false;