Gov doc is not correct on proposal immediately be accepted

[yihuang]

Summary of Bug

In doc of gov module, it says:

Namely, if the ratio of Yes votes to InitTotalVotingPowerexceeds 2:3, the proposal will be immediately accepted, even if the Voting period is not finished.

But according to our test, one still need to wait for voting_end_time even if all voted yes.

Version

v0.34.4-0.20201014201753-24714f80cb16

Steps to Reproduce

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[tomtau]

a bigger related issue: #4628 (comment)

[yihuang]

Also this line: "Users that deposited on proposals can recover their
deposits if ... OR if the proposal never entered voting period" is not correct according to our testing. in the test, the deposits are burned if the proposal never entered voting period.

[yihuang]

Also this line: "some participants can be forbidden to vote on a proposal under a
certain validator if participant bonded or unbonded Atoms to said validator after proposal
entered voting period", in our testing, the user delegates after proposal entered voting period, it still can vote with the newly bonded coins.