[TD]assorted Preference updates

- section line convention label
- remove superfluous save/restore on changeEvent
- change default scrub count
- add preference for default symbol dir
- add preference for display of section cut line

src/Mod/TechDraw/App/Preferences.cpp

@@ -250,6 +250,24 @@ bool Preferences::showDetailHighlight()
     return getPreferenceGroup("General")->GetBool("ShowDetailHighlight", true);
 }
 
+//! returns the default or preferred directory to search for svg symbols
+QString Preferences::defaultSymbolDir()
+{
+    std::string defaultDir = App::Application::getResourceDir() + "Mod/TechDraw/Templates";
+    std::string prefSymbolDir = getPreferenceGroup("Files")->GetASCII("DirSymbol", defaultDir.c_str());
+    if (prefSymbolDir.empty()) {
+        prefSymbolDir = defaultDir;
+    }
+    QString symbolDir = QString::fromStdString(prefSymbolDir);
+    Base::FileInfo fi(prefSymbolDir);
+    if (!fi.isReadable()) {
+        Base::Console().Warning("Symbol Directory: %s is not readable\n",
+                                prefSymbolDir.c_str());
+        symbolDir = QString::fromStdString(defaultDir);
+    }
+    return symbolDir;
+}
+
 std::string Preferences::svgFile()
 {
     std::string defaultDir = App::Application::getResourceDir() + "Mod/TechDraw/Patterns/";
@@ -402,7 +420,7 @@ bool Preferences::autoCorrectDimRefs()
 //! number of times to clean the output edges from HLR
 int Preferences::scrubCount()
 {
-    return getPreferenceGroup("General")->GetInt("ScrubCount", 0);
+    return getPreferenceGroup("General")->GetInt("ScrubCount", 1);
 }
 
 //! Returns the factor for the overlap of svg tiles when hatching faces
@@ -540,6 +558,19 @@ int Preferences::sectionLineConvention()
     return getPreferenceGroup("Standards")->GetInt("SectionLineStandard", 1);
 }
 
+//! true if a section line annotation should be drawn on the source view.  If false,
+//! no cut line, change marks, arrows or symbol will be drawn.
+bool Preferences::showSectionLine()
+{
+    return getPreferenceGroup("Decorations")->GetBool("ShowSectionLine", true);
+}
+
+//! true if the section cut line should be drawn on the source view. Some conventions do not draw the
+//! actual cut line, but only the change points, arrows and symbols.
+bool Preferences::includeCutLine()
+{
+    return getPreferenceGroup("Decorations")->GetBool("IncludeCutLine", true);
+}
 
 //! true if the GeometryMatcher should be used in correcting Dimension references
 bool Preferences::useExactMatchOnDims()