Angle field fails to take ephemeral focus

[rachel-fenichel]

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Component

field-angle

Description

Error in console: attempted to take ephemeral focus when it's already held.

New issue with v12.

Reproduction steps

Link against Blockly v12.0.0-beta.5 and open the plugin test page.

Click an angle field to open the editor.

Stack trace

Screenshots

Same issue as the slider issue reported in #2514--note that this screenshot is from the slider, but the details still apply.

[BenHenning]

This has the same issue and fix as #2514 (comment).

[BenHenning]

Fixed in #2521.