battstat low power warning window display issues

[danboid]

Expected behaviour

battstats low battery power warning windows should fit on the screen and not contain bits of unprocessed markup in the messages.

Actual behaviour

One of the battstat lower power warning windows is vertically to big to fit on my 1080p laptop display. There are only a couple of sentences displayed in this window (something like "Your battery charge is critically low and will shutdown soon if you don't plug it in") so the window is much bigger than it needs to be and as a result I can only see the top half of the OK button in the bottom right corner of the window that you have to click to dismiss it. I will get a screenshot next time I see it and add it to this issue.

Also, one of the other low power warnings that comes up as notification 'bubble' (dunno what they're called, they're small yellowish windows without the regular window toolbar) in the top right of the desktop prints some markup code like <b>low power warning</b> instead of making the text bold.

Steps to reproduce the behaviour

Add battery charge monitor to your laptops panel, unplug from AC and wait for the battery charge to get low on a laptop with a 1080p screen or less. I'm not sure if this bug applies to laptops with higher res displays.

MATE general version

1.24.0

Package version

1.24.0-1

Linux Distribution

Ubuntu 20.04

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