Make avatar preferences work again

They were waiting for commit() to be called, which never happened
because of the settings redesign getting rid of the OK/Apply/Cancel
buttons. Now there's an autoCommit option on the model, which will call
it automatically.

src/desktop/dialogs/logindialog.cpp

@@ -72,7 +72,7 @@ struct LoginDialog::Private {
 
 		// Identity & authentication page
 		ui->username->setValidator(new UsernameValidator(dlg));
-		avatars = new AvatarListModel(dlg);
+		avatars = new AvatarListModel(false, dlg);
 		avatars->loadAvatars(true);
 		ui->avatarList->setModel(avatars);
 

src/desktop/dialogs/settingsdialog/network.cpp

@@ -76,7 +76,7 @@ void Network::initAvatars(utils::SanerFormLayout *form)
 	avatars->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
 	avatars->setSelectionMode(QAbstractItemView::ExtendedSelection);
 
-	auto *avatarsModel = new AvatarListModel(this);
+	auto *avatarsModel = new AvatarListModel(true, this);
 	avatarsModel->loadAvatars();
 	avatars->setModel(avatarsModel);
 	avatars->setItemDelegate(new AvatarItemDelegate(this));

src/libclient/utils/avatarlistmodel.cpp

@@ -8,8 +8,9 @@
 #include <QBuffer>
 #include <QCryptographicHash>
 
-AvatarListModel::AvatarListModel(QObject *parent)
+AvatarListModel::AvatarListModel(bool autoCommit, QObject *parent)
 	: QAbstractListModel(parent)
+	, m_autoCommit(autoCommit)
 {
 }
 
@@ -65,6 +66,10 @@ bool AvatarListModel::removeRows(int row, int count, const QModelIndex &parent)
 		m_avatars.remove(row);
 	}
 	endRemoveRows();
+
+	if(m_autoCommit) {
+		commit();
+	}
 	return true;
 }
 
@@ -86,6 +91,10 @@ void AvatarListModel::addAvatar(const QPixmap &icon)
 		QString()
 	};
 	endInsertRows();
+
+	if(m_autoCommit) {
+		commit();
+	}
 }
 
 void AvatarListModel::loadAvatars(bool includeBlank)

src/libclient/utils/avatarlistmodel.h

@@ -15,7 +15,7 @@ class AvatarListModel final : public QAbstractListModel
 		FilenameRole = Qt::UserRole + 1,
 	};
 
-	AvatarListModel(QObject *parent=nullptr);
+	AvatarListModel(bool autoCommit, QObject *parent=nullptr);
 
 	int rowCount(const QModelIndex &parent = QModelIndex()) const override;
 	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
@@ -45,6 +45,7 @@ public slots:
 		QString filename;
 	};
 
+	bool m_autoCommit;
 	QVector<Avatar> m_avatars;
 	QStringList m_deletions;
 };