Room loading improvements

[rodrigok]

Code to show the amount of finds via console

models = require('meteor/rocketchat:models');
Object.keys(models).forEach((modelName) => {
	if (models[modelName].after) {
		models[modelName].after.find(function(userId, selector) {console.log('find', modelName, selector/*, (new Error).stack*/)});
		models[modelName].after.findOne(function(userId, selector) {console.log('findOne', modelName, selector/*, (new Error).stack*/)});
	}
})