Add link to hide destination tag.
Move link to add destination tag to where the field appears.

Also updated text label according to RT-1767.
[FIX] trade.js: offerCreate - only update angular if not in phase

RT-1961 breaks on tx.on('error'...
[FIX] trade.js: set order mode to trade when user cancels request for secret
[FIX] trade.js: handle errors on offerCancel
Merge pull request #1335 from shekenahglory/develop

[FIX] trade: Fixes and improvements to error handling
[FIX] Make no paths error message better
Merge pull request #1336 from annatonger/fix/erromsg

[FIX] Make no paths error message better
Merge pull request #1309 from abahgat/hide-destination-tag

[FIX] Add link to hide destination tag in send payment form.
Merge pull request #1310 from abahgat/move-add-dest-tag

[FIX] Move link to add destination tag to where the field appears.