Bug 988296 - imsSettings-header points to messageSettings, should be imsSettings ('Message settings' vs. 'IMS settings')
Merge pull request #17648 from Archaeopteryx/settings-bug988296-imsSettingsHeader

Bug 988296 - imsSettings-header points to messageSettings, should be imsSettings ('Message settings' vs. 'IMS settings'). r=arthurcc