Add an optional pop-up notification when auto-turn is toggled (#496)

* Implement (most of) pop-up notification when autoturn is enabled

* Add neato fading: doesn't appear to impact performance

* formatting

* added macro and UI for notification of auto-turn

* changed notification default to true for auto-turn

* added common issue for trackers

* added warning for custom keys

* minor documentation markdown format fixes

* fix qml syntax error in atgb

* gasd

Co-authored-by: ykeara <ykeara1@gmail.com>

src/utils/paths.cpp

@@ -57,4 +57,15 @@ optional<string> settingsDirectory()
     return path.toStdString();
 }
 
+std::optional<std::string> verifyIconFilePath( std::string filename )
+{
+    const auto notifIconPath = paths::binaryDirectoryFindFile( filename );
+    if ( !notifIconPath.has_value() )
+    {
+        LOG( ERROR ) << "Could not find icon \"" << filename << "\"";
+    }
+
+    return notifIconPath;
+}
+
 } // namespace paths

src/utils/paths.h

@@ -12,4 +12,6 @@ optional<string> binaryDirectoryFindFile( string fileName );
 
 optional<string> settingsDirectory();
 
+std::optional<std::string> verifyIconFilePath( std::string filename );
+
 } // namespace paths