Community - add powerdown amount

[roadscape]

From @economicstudio #35:

Close #34 (and also fix double space typo, explained in steemit/condenser#3186)

This is moved from steemit/condenser#3193 per @roadscape's request.

Currently, it only shows the powerdown schedule

Add the powerdown amount information

Note that "~" is to indicate that it's approximate, since the powerdown amount is based on VEST not SP.

I also thought about adding an addition row in the "STEEM POWER" section, but it may require to add some message (like delegation information) and then translation is also needed which might be too much. So I've utilized the current powerdown schedule information area. Thanks.

full screenshot on my dev server

ps. I'm glad to see some community PRs were merged recently, and hope this will be merged soon too. Thank you!

[jredbeard]

lgtm

[roadscape]

Thanks @economicstudio!