Bug 802266 - Remove unused definitions in nsComposeStrings.h and composeMsgs.properties. r=mkmelin, r=Neil

Initially by Moritz Beller <moritzbeller@gmx.de>
Bug 802266 - Review NS_* definitions in nsComposeStrings.h. r=mkmelin, r=Neil

Initially by Moritz Beller <moritzbeller@gmx.de> and Johannes Buchner <johannes.buchner.acad@gmx.com>
Bug 975381 - Use DOM_VK_RETURN/NS_VK_RETURN instead of DOM_VK_ENTER/NS_VK_ENTER in /calendar. r=philipp
Bug 975381 - Use DOM_VK_RETURN/NS_VK_RETURN instead of DOM_VK_ENTER/NS_VK_ENTER in /im. r=florian
Bug 975381 - Use DOM_VK_RETURN/NS_VK_RETURN instead of DOM_VK_ENTER/NS_VK_ENTER in /suite/browser. r=IanN
Bug 975381 - Use DOM_VK_RETURN/NS_VK_RETURN instead of DOM_VK_ENTER/NS_VK_ENTER in /suite/common. r=IanN
Bug 975381 - Use DOM_VK_RETURN/NS_VK_RETURN instead of DOM_VK_ENTER/NS_VK_ENTER in /suite/mailnews. r=IanN
CLOSED TREE