Editorial: Fix several instances of incorrect 'i.e.' and 'e.g.' references missing commas

[rahimabdi]

The following i.e. and e.g. references were missing a comma and this PR adds them:

• [if the element does not prohibit use of the attribute. If the label text is available in the DOM (i.e. typically visible text]
• [container element that is controlled by an element that has the aria-activedescendant attribute (e.g. see combobox).]
• [SHOULD prefer full punctuation verbosity to ensure common symbols (e.g. "-") are spoken]
• [When trusted dictionary sources list both hyphenated or non-hyphenated spellings (e.g. "multi-line"
• [but if future attributes include acronym usage, attempt to match existing DOM conventions (e.g. ID becomes Id).]]

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