Minor Chinese check & jsx addition (#4973)

* zh-*: transition from "like" back to "fav"

This commit reverts the translation for the yellow-star "fav" button
back to "fav" in Chinese. Some ambuiguity between "like" and "fav" is
deliberately used in zh-TW/HK by using the existing phrase "最爱"
(favorite (adj.), lit. love-most) instead of "收藏" (favourite (v.),
"collect") in some instances.

Fixes #3511.

* zh-*: apply suggestions for PR #4557

* zh-cn: de-monetize ya account

In Chinese two separate characters, 账 and 帐, can be used to spell the
word for account (账/帐户). However, the one with a 贝 on the left is
evolved from the latter specifically for monetary purposes. Since
people usually can't figure out which one to use, it might be a good
idea to use the original not-so-money one.

* zh-*: complete jsx translation

app/views/user_mailer/confirmation_instructions.zh-cn.text.erb

@@ -3,7 +3,7 @@
 你刚刚在 <%= @instance %> 创建了帐号。
 
 点击下面的链接来完成注册啦 : <br>
-<%= link_to '确认账户', confirmation_url(@resource, confirmation_token: @token) %>
+<%= link_to '确认帐户', confirmation_url(@resource, confirmation_token: @token) %>
 
 别忘了看看 <%= link_to 'terms and conditions', terms_url %>。