[FIX] Trade filter on history page

Trade filter shows only partially/fully funded trades. I would call this a feature, but it's classified as a bug in Jira, hence the [FIX] label.

[Jira RT-1835](https://ripplelabs.atlassian.net/browse/RT-1835)
[Bountysource](https://www.bountysource.com/issues/2842682-create-trade-filter-in-history-tab)

(- modified since last pull request. "Orders" filter is now identical to earlier "offers" filter.)
[FIX] Button UI: Delete btn-cancel css styling
Merge pull request #1385 from yongsoo/develop

[FIX] Button UI: Delete btn-cancel css styling
[FIX] Unfunded banner flicker (RT-2064)
[FIX] Currency dropdown options fix
Merge pull request #1387 from vhpoet/dropdown

[FIX] Currency dropdown options. RT-2061 #inreview
Merge pull request #1386 from Madsn/patch-unfunded-banner-rt-2064

[FIX] Unfunded banner flicker (RT-2064)
Merge pull request #1376 from Madsn/trade-filter

[FIX] Trade filter on history page
[FIX] Jsonrewriter: Don't calculate order price for zero amounts