Reword account and asset Transaction field references

[michaeldiamant]

Rewords account and asset Transaction field references to hopefully make the intent clearer based on feedback from @algoanne.

[algochoi]

Looks good, although I am biased toward specifying that these are foreign assets and foreign applications, as per go-algorand docs in addition to these changes.

[algoanne]

@algochoi there's definitely some inconsistency across the documentations when referring to these and it is confusing, but would probably require more concerted effort to reach consistency in all the places. This smaller change at least fixes an instance that I found particularly misleading since "application accounts" can have a distinct meaning.

[michaeldiamant]

Looks good, although I am biased toward specifying that these are foreign assets and foreign applications, as per go-algorand docs in addition to these changes.

I briefly spoke with @algochoi and agreed that we can leave as is for the PR because array of foreign accounts may also cause some confusion. Though we both agree there's room for improvement beyond the PR.