2019.5

Gyro, show(array), IR Seeker, while

- Gyrosensor for EV3 in 2D model/simulation
- Function block renamed to Expression (code).
- Replace By context menu now has icons for blocks
- Fixed crash when JavaScript execution in 2D-model was stopped with
toolbar button
- Checker service can check JS.
- EV3 IR seeker support
- Fixed encoders in 2D-model when robot is stuck
- `While` block for NXT
- `brick.display().show(array, width, height, format)` format is
`"rgb888"`, `"grayscale8"`, `"rgb32"`
- `width` for `wall`s in xml.