Keyboard shortcuts for toolbar buttons

[renkun-ken]

The toolbar works nicely in web browser. I'm wondering if it is possible to add some keyboard shortcuts to those toolbar buttons, e.g.

left, right, +, -, ctrl+s, del

[nx10]

Great suggestion! I have implemented the keyboard shortcuts for the life server.

[renkun-ken]

In the webbrowser, the keyboard shortcuts work nicely. However, none works in VSCode WebView. I guess it is caused by the webpage being embedded inside a iframe in the webview. I'll do more search and experiment and see if there's anything we can do.

[renkun-ken]

Related: microsoft/vscode#65452

Looks like we should do some rebroadcasting of the key events to the iframe as suggested at microsoft/vscode#65452 (comment).

[nx10]

I just switched from the <object> to a <img> tag for displaying the SVG. This fixes some issues with user input for me. Does this show any difference in the vscode webview?

[renkun-ken]

With the latest commit, the keyboard shortcuts work nicely in VSCode WebView now. Thanks!