BISERVER-4188 - UTF-8 bug in Mantle.jsp, localization is not working on home page

What was done:
1) changed page encoding in Mantle.jsp to reflect content encoding
2) verified that properly encoded properties files (\uxxxx instead of
symbol) now allow to display unicode symbols
BISERVER-10832 Invalid setting in ESAPI.properties - Logger.LogServerIP is neither true nor false

whitespace was delete
BISERVER-8913 - Mail Server Setup - Save button needs confirmation popup.

fix for new field "Email Name used as Sender"
[SP-848] Backport of BISERVER-10602 - Issues with groups/roles that have underscores in their names in 5.0
Merge pull request #1265 from aliakseihaidukou/BISERVER-8913

BISERVER-8913 - Mail Server Setup - Save button needs confirmation popup...
Merge pull request #1250 from kolinus/BISERVER-4188

BISERVER-4188 - UTF-8 bug in Mantle.jsp, localization is not working on ...
Merge pull request #1261 from AliaksandrDrebenchuk/BISERVER-10832

BISERVER-10832 Invalid setting in ESAPI.properties - Logger.LogServerIP is neither true nor false
Merge branch 'master' of https://github.com/pentaho/pentaho-platform