ui: Updates for release

* updated color scheme highlight colors
* fixed highlight color resetting
* prevent project file being save with no changes
* fixed MessageListener crash due to alive flag being set too late
* new edit project icon

src/lib/settings/ProjectSettings.cpp

@@ -57,6 +57,11 @@ bool ProjectSettings::operator==(const ProjectSettings& other) const
 		utility::isPermutation<std::string>(getSourceExtensions(), other.getSourceExtensions());
 }
 
+bool ProjectSettings::operator!=(const ProjectSettings& other) const
+{
+	return !(*this == other);
+}
+
 void ProjectSettings::save(const FilePath& filePath)
 {
 	m_projectName = "";