Add alert rule option to invert devices and groups "map to" list (#10954)

* Add alert rule option to invert map to

* Add alert rule option to invert map to

* Update 2019_12_17_151314_add_invert_map_to_alert_rules.php

* fix invert map to does not work if several groups are set in map to

* fix invert map to does not work if several groups are set in map to

* fix invert map to does not work if several groups are set in map to

* Clarify labels

* Clarify labels

* Clarify labels

* Clarify labels

* fix invert map to at rule creation

* clarify invert label

database/migrations/2019_12_17_151314_add_invert_map_to_alert_rules.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+
+class AddInvertMapToAlertRules extends Migration
+{
+
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('alert_rules', function (Blueprint $table) {
+            $table->boolean('invert_map')->default(0);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('alert_rules', function (Blueprint $table) {
+            $table->dropColumn(['invert_map']);
+        });
+    }
+}