add block to stop program (#943)

* add block to stop program

* renaming

docs/reference/brick/exit-program.md

@@ -0,0 +1,18 @@
+# exit Program
+
+Stops the program and returns to the brick menu
+
+```sig
+brick.exitProgram();
+```
+
+## Example
+
+Do a sequence of motor commands and stop the program.
+
+```blocks
+motors.largeA.run(50)
+pause(500)
+motors.stopAll()
+brick.exitProgram();
+```

libs/core/battery.ts

@@ -26,6 +26,7 @@ namespace brick {
      */
     //% blockId=brickBatteryProperty block="battery %property"
     //% group="Battery"
+    //% blockGap=8
     //% help=brick/battery-property
     export function batteryInfo(property: BatteryProperty): number {
         const info = sensors.internal.getBatteryInfo();

libs/core/buttons.ts

@@ -85,7 +85,7 @@ namespace brick {
         //% blockId=buttonIsPressed
         //% parts="brick"
         //% blockNamespace=brick
-        //% weight=81 blockGap=8
+        //% weight=81
         //% group="Buttons"
         //% button.fieldEditor="brickbuttons"
         isPressed() {

libs/ev3/brick.ts

@@ -0,0 +1,13 @@
+namespace brick {
+    /**
+     * Exits the program to the main menu. (in the simulator restarts it)
+     */
+    //% blockId=loopstop block="exit program"
+    //% help=reference/brick/exit-program
+    //% weight=10
+    //% blockGap=8
+    //% group="Buttons"
+    export function exitProgram() {
+        control.reset();
+    }
+}

libs/ev3/ns.ts

@@ -1,6 +1,6 @@
 
 //% color="#68C3E2" weight=100 icon="\uf106"
-//% groups='["Buttons", "Screen", "Battery"]'
+//% groups='["Buttons", "Screen", "Power"]'
 //% labelLineWidth=60
 namespace brick {
 }

libs/ev3/pxt.json

@@ -4,6 +4,7 @@
     "files": [
         "README.md",        
         "ns.ts",
+        "brick.ts",
         "startup.ts",
         "images.jres",
         "images.ts",