Add SearchField for Qt Quick Controls

// This implements a QSortFilterProxyModel internally and exposes relevant properties
// logic
Q_PROPERTY(QVariant sourceModel READ sourceModel WRITE setSourceModel NOTIFY sourceModelChanged)
Q_PROPERTY(QVariant filteredModel READ filteredModel WRITE setFilteredModel NOTIFY filteredModelChanged)
Q_PROPERTY(int filterRole READ filterRole WRITE setFilterRole NOTIFY filterRoleChanged)
Q_PROPERTY(int sortRole READ sortRole WRIT setSortRole NOTIFY sortRoleChanged) //optional, default to filter role
Q_PROPERTY(Qt::CaseSensitivity filterCaseSensitivity WRITE setFilterCaseSensitivity NOTIFY filterCaseSensitivityChanged)
Q_PROPERTY(Qt::CaseSensitivity sortCaseSensitivity WRITE setSortCaseSensitivity NOTIFY sortCaseSensitivityChanged)
// if auto completion/suggestion should be enabled
Q_PROPERTY(bool autoSuggest READ autoSuggest WRITE setAutoSuggest NOTIFY autoSuggestChanged FINAL)
// if the search happens while you type or not
Q_PROPERTY(bool live READ live WRITE setLive NOTIFY liveChanged)

//visual
Q_PROPERTY(QQuickItem *searchIndicator READ searchIndicator WRITE setSearchIndicator NOTIFY searchIndicatorChanged FINAL)
Q_PROPERTY(QQuickItem *clearIndicator READ clearIndicator WRITE setClearIndicator NOTIFY ClearIndicatorChanged FINAL)

Q_SIGNALS:
void searchTriggered();
void cleared();