Add option to hide/show plot sliders

client/src/ui.h

@@ -40,6 +40,7 @@ typedef struct {
     bool window_changed; // track if plot/overlay pos/size changed to save on exit
     qtWindow_t plot;
     qtWindow_t overlay;
+    bool overlay_sliders;
 //    char *defaultPaths[spItemCount]; // Array should allow loop searching for files
     clientdebugLevel_t client_debug_level;
 //    uint8_t device_debug_level;