9.3-RC1

Changes since 9.3-beta2

• Adds a warning message at the top of the metabox and sidebar for when the web worker initialization or analysis fail when using the recalibrated analysis beta.
• Fixes a bug where the first tab of the metabox would be empty when using WordPress 4.8.x.
• Fixes a bug where the cursor would jump from the keyphrase input field to the post content when typing in the keyphrase input field when a marking was active.
• Fixes a bug where an error would be thrown in the console when typing in the focus keyphrase field, while a marker is active.
• Disabled recalibration for 9.3.