implement find in page

[diracdeltas]

known issues:

• ESC is handled by a local shortcut, so this uses SHIFT+ESC to close the findbar
• Showing number of matches doesn't work yet
• Case-sensitivity state isn't preserved when the findbar is re-displayed

Auditors: @bbondy

[diracdeltas]

Also, this uses electron-prebuilt 0.36.2

[bbondy]

In addition to the things you mentioned, this is also needed:

• Incremental search, as you type it selects without having to press enter
• Placeholder text isn’t showing up on the find bar
• The find bar in brave/browser is probably closer to the look we want since it only takes up the top right space.

[bbondy]

Looking good so far, thanks for taking this.

[diracdeltas]

incremental search should be working as of latest commit

[bbondy]

Oops I think I had an older version of your branch pulled with the white bar going all the way across too. The newer update looks great. Feel free to merge and then do the rest as follow ups.

[diracdeltas]

thanks, merged

[diracdeltas]

oops, apparently pull req with failing CI can't be merged from a phone. i'll do it later