[FIX] Balance overview: Make currency font clearer

RT-2270 #inreview
In the "XRP - Ripple" text (and in "Bitcoin" too), the lowercase "i"
looked like an uppercase "I", due to bad font rendering with the bold
font. Increase the font size a bit to make the i-dot clear.
[TASK] Balance overview: Use ndash for currency

In the Balance overview, native "XRP - Ripple" currency title, the dash
was a normal minus sign. Using an ndash (ASCII 150) looks better.
[FIX] Send: Add spacing for destination tag hider

RT-2378 #inreview
On the Send tab, the Destination tag has a hide-link behind. Instead of
separating it with a pipe, use spacing instead.
[FIX] Disallow multiple subscriptions to account transactions

It fixes the issue with notifications appearing twice, and makes the client faster.
[TASK] L10n: Update messages.pot template
[FIX] Trustline: Fix notifications when deleting trustline
[FIX] History: Disable currency filter in code
Merge pull request #1607 from vhpoet/cur

[FIX] History: Disable currency filter in code
[TASK] Jsonrewriter: Check DeliveredAmount when creating transaction.amountSent
[FIX] History: Show amountSent instead of amount where applicable
Merge pull request #1609 from vhpoet/release

[FIX] History: Show delivered amount instead of the amount an account tried to send
[FIX] History: Disable currency filter in code
Merge pull request #1610 from vhpoet/release

[FIX] History: Disable currency filter in code
Hotfix 1.0.10-1
Merge branch 'release' into develop
[TASK] Trade: Clearer copy when order is filled on market order
[TASK] Balance overview: Use px unit for font size
Merge pull request #1597 from jublonet/feature/2270-balance-lowercase-i

[FIX] Balance overview: Make currency font clearer
Merge pull request #1599 from jublonet/feature/2378-destination-tag-spacing

[FIX] Send: Add spacing for destination tag hider
Merge pull request #1605 from jublonet/feature/update-pot

[TASK] L10n: Update messages.