Do not display non-functional errors of mail parsing in description

Currently the HTML parser in JSD attempts to convert the content of a message to wiki markup.

In most cases this works just fine. However, some mail clients (e.g. Airmail) add rgba-colors to each paragraph (which are just black though) and this results in very annoying lines in the body of the received content stating:

color: Color value is invalid

This makes the message pretty unreadable. An example:

color: Color value is invalid

Hello,
color: Color value is invalid
color: Color value is invalid

Can you guys please take a look at this and that?
color: Color value is invalid

If you need some help, just let me know!
color: Color value is invalid
color: Color value is invalid

Best regards,
Dennis

These errors are outputted the same as the content: same size, same color so they are essentially part of the body. Why these errors have to be shown here, I don't know. In my opinion they do not add anything useful and makes working with JSD a lot more impractical.

Atlassian support recommended to change the renderer to "Default Text Renderer" but this results in seeing the raw wiki code instead, including all the color tags.

If one provides an incorrect color (as there is no validation) in Confluence its simply shown in the default color (black). However, JSD outputs all errors in the body, where it shouldn't be.

Please hide these errors from the description.