Are there any related issues?

Did not find any.

What operating system are you using?

macos

What version of Mailspring are you using?

1.0.3

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Does this feature exist in another mail client or tool you use?

Yes

Please provide a reading pane below the messages pane.
A reading pane beside the messages pane wastes a lot of space. Space below the messages is

In text editing, QWERTZ keyboard works fine, however keyboard shortcuts Y and Z are swaped.

Expected behavior

If I press "z" button (on QW... row) a read flag should be toggled
If I press "y" button (on YXC.. row) a "copy message" function should be evoked

Actual behavior

If I press "z" button (on QW... row) a "copy message" function is evoked
If I press "y" button (on YXC.. row)

If you select the "None" or "Default" email signature it is possible to paste text into the preview field. This should not be possible.
Seen in the desktop client.

Problem
After #621 is finished, we should add the input to the "Getting Started" page so users can actually set this field.

Solution
Add an input below the greeting input on the "Getting Started" page (which is here: https://github.com/papercups-io/papercups/blob/master/assets/src/components/account/GettingStartedOverview.tsx#L306-L318)

The label should say "**Set an away message

I have the following file that handles my sendgrid set up.

import sgMail from '@sendgrid/mail';

const sendGridApiKey = process.env.SENDGRID_API_KEY;

if (!sendGridApiKey) {
  throw new Error('The sendgrid api key has not been set in the environment variables');
}

sgMail.setApiKey(sendGridApiKey);

export { sgMail };

After setting my api key I need to be able to do som