Error highlighting and reporting problems for the current password on the user profile form

Problem/Motivation

When changing the e-mail and/or password fields on the user profile form without entering a correct 'current password' the error reporting is off. Multiple similar messages are thrown if both fields are changed and the 'current password' field is not marked as an error.

The problem is also apparent when the inline_form_errrors (IFE) module is enabled.

Original problem identified in #1493324-362: Inline form errors for accessibility and UX → .

Proposed resolution

The 'current password' field should be highlighted because it is actually the problematic field. Also instead of two almost similar message, one single message should be shown, when both e-mail and password are being changed.

In case of IFE all fields need a helpful error message below the fields.

Before screenshot (Core 8.2.x without inline_form_errors module)

After screenshot (Core 8.2.x without inline_form_errors module)

Before screenshot (Core 8.2.x with inline_form_errors module)

After screenshot (Core 8.2.x with inline_form_errors module)