fix: minor issues in browser tests

[rachel-fenichel]

The basics

• I validated my changes

The details

Resolves

Fixes some issues that I found while working on #7488.
Webdriverio v8.16 is slightly stricter about some things.

Proposed Changes

• In undo/redo tests: use a lower case z instead of upper case, and add a standard pause after the undo.
• In the procedure test: accept the alert to close it at the end of the test.
• In field edit test: don't click between edits--the field editor is already open.
• In the toolbox drag test: scroll a small amount at a time to avoid dragging the mouse outside of the browser window.

Reason for Changes

Newer webdriverio is stricter about keeping drags within the screen and not clicking on occluded elements. Keys are case sensitive, and not closing the alert works but throws a warning.

Test Coverage

These are tests!