Re-add inspector tab as an option (#5867)

- add option "inspectorWindow" to switch from tab to fullscreen view
- add option "zoomOnScroll" to configure scroll device for zoom or pan
- add both options to preferences
- filepanel creates tab if not inspectorWindow
- inspector adapts to settings inspectorWindow and zoomOnScroll
- filebrowser shows context menu item for inspector only if inspectorWindow

rtgui/options.cc

@@ -452,6 +452,8 @@ void Options::setDefaults()
     histogramDrawMode = 0;
     curvebboxpos = 1;
     complexity = 1;
+    inspectorWindow = false;
+    zoomOnScroll = true;
     prevdemo = PD_Sidecar;
 
     rgbDenoiseThreadLimit = 0;
@@ -1463,6 +1465,13 @@ void Options::readFromFile(Glib::ustring fname)
                     complexity = keyFile.get_integer("GUI", "Complexity");
                 }
                 
+                if (keyFile.has_key("GUI", "InspectorWindow")) {
+                    inspectorWindow = keyFile.get_boolean("GUI", "InspectorWindow");
+                }
+
+                if (keyFile.has_key("GUI", "ZoomOnScroll")) {
+                    zoomOnScroll = keyFile.get_boolean("GUI", "ZoomOnScroll");
+                }
             }
 
             if (keyFile.has_group("Crop Settings")) {
@@ -2242,6 +2251,8 @@ void Options::saveToFile(Glib::ustring fname)
         keyFile.set_integer("GUI", "CurveBBoxPosition", curvebboxpos);
         keyFile.set_boolean("GUI", "Showtooltip", showtooltip);
         keyFile.set_integer("GUI", "Complexity", complexity);
+        keyFile.set_boolean("GUI", "InspectorWindow", inspectorWindow);
+        keyFile.set_boolean("GUI", "ZoomOnScroll", zoomOnScroll);
 
         //Glib::ArrayHandle<int> crvopen = crvOpen;
         //keyFile.set_integer_list ("GUI", "CurvePanelsExpanded", crvopen);