[cssom-view] Remove "familiar with" check for move/resize methods

[domenic]

Closes #1725 by removing the usage of incumbent settings object. I could find no evidence of such a check in the Blink, Gecko, or WebKit codebases. Indeed, such a check should not generally be necessary, as (unlike, e.g., window.close()) these methods are not accessible cross-origin.

Also includes various changes for things that have updated in other specs:

• Use "this" instead of "context object"
• Use "string is" instead of "case-sensitive"
• Use "start node" and "start offset" instead of referring to properties of Range (or now, AbstractRange)
• Link to the correct "event loop" definition
• Remove redundant anchor blocks, as these days most definitions are properly exported

[tabatkins]

ping @emilio