Project: Unify handling of displayName

Unify the handling of displayName with a proper changed signal across
all projects.

Change-Id: I7e503528854b85f6f38de4b0943775f82a0d6123
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/projectexplorer/project.cpp

@@ -141,6 +141,8 @@ public:
     QVariantMap m_pluginSettings;
     Internal::UserFileAccessor *m_accessor = nullptr;
 
+    QString m_displayName;
+
     Kit::Predicate m_requiredKitPredicate;
     Kit::Predicate m_preferredKitPredicate;
 
@@ -178,6 +180,11 @@ Project::~Project()
     delete d;
 }
 
+QString Project::displayName() const
+{
+    return d->m_displayName;
+}
+
 Core::Id Project::id() const
 {
     QTC_CHECK(d->m_id.isValid());
@@ -455,6 +462,14 @@ bool Project::setupTarget(Target *t)
     return true;
 }
 
+void Project::setDisplayName(const QString &name)
+{
+    if (name == d->m_displayName)
+        return;
+    d->m_displayName = name;
+    emit displayNameChanged();
+}
+
 void Project::setId(Core::Id id)
 {
     d->m_id = id;