Method setMonitors

tiling.js:2427–2430

* Sets this.monitors map and updates prevMonitors map (for restore).

(monitor, space, save = false)

     * Sets this.monitors map and updates prevMonitors map (for restore).
     */
    setMonitors(monitor, space, save = false) {
        this.monitors.set(monitor, space);
        saveState.update(save);
    }

    _updateMonitor() {
        let monitorSpaces = this._getOrderedSpaces(this.selectedSpace.monitor);