* remove instandsenddepth option
* remove CInstantSend::GetConfirmations
* Explicit IXlocks processing in the code using GetDepthInMainChain
* remove dummy confirmations for IX locks
* remove unused constant
* Track IS status in TransactionStatus
* Highlight IS in tx list
* Customize confirmation icons for IS txes
* Fix issues:
- bring back removed comment;
- simplify 2 complex condition to ose `IsTrusted()` function only;
- rename `IsLockedIX` function to 'IsLockedByInstantSend`;
* Revert condition with IsTrusted()
* code style fix
* remove dummy confirmations from instantsend.md
* fix instantsend.md
* Doc: fix broken formatting in markdown #headers
Insert a space in markdown headers between the #'s and the header text.
(It appears that the space is required since a github update a year ago
https://github.com/blog/2100-github-pages-now-faster-and-simpler-with-jekyll-3-0)
* Update REST-interface.md
* Update guide-startmany.md
* Update instantsend.md
* Update keepass.md
* Update release-process.md