Tool temp shows as 0°C when printer is turned off

[timur-tabi]

This is a very minor bug.

When the printer is turned on, NavbarTemp shows the SoC, Tool (extruder), and Bed temp just fine:

However, when the printer is turned off, the Bed temp is not shown (which is good), but the Tool temp is shown as 0°C (which is bad):

It's inconsistent that NavbarTemp knows not to show the Bed temperature if the printer is off, but it also should not show the Tool temp if the printer is off.

PLEASE CAREFULLY FILL EACH POINT

1. Hardware and operating system version:

RPi 3B+
Linux octopi 4.14.34-v7+ #1110 SMP Mon Apr 16 15:18:51 BST 2018 armv7l GNU/Linux

2. Octoprint version:

OctoPrint version : 1.4.0
OctoPi version : 0.15.1

3. Plugin version:

0.14

4. Print screen of plugin configuration:

5. Plugin full log file

octoprint.log

[LazeMSS]

Should be fixed in latest release

[Cosik]

@timur-tabi did you check it?

[timur-tabi]

I'm still on 0.14. How do I test a pre-release version of your plugin?