i18 missed things

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/structures/UserSettings.js

@@ -966,7 +966,7 @@ module.exports = React.createClass({
             }
 
             microphoneDropdown = <div>
-                <h4>Microphone</h4>
+                <h4>{_t('Microphone')}</h4>
                 <Dropdown
                     className="mx_UserSettings_webRtcDevices_dropdown"
                     value={this.state.activeAudioInput || defaultInput}
@@ -986,7 +986,7 @@ module.exports = React.createClass({
             }
 
             webcamDropdown = <div>
-                <h4>Cameras</h4>
+                <h4>{_t('Camera')}</h4>
                 <Dropdown
                     className="mx_UserSettings_webRtcDevices_dropdown"
                     value={this.state.activeVideoInput || defaultInput}

src/i18n/strings/en_EN.json

@@ -136,6 +136,8 @@
   "No media permissions": "No media permissions",
   "You may need to manually permit Riot to access your microphone/webcam": "You may need to manually permit Riot to access your microphone/webcam",
   "Default Device": "Default Device",
+  "Microphone": "Microphone",
+  "Camera": "Camera",
   "Advanced": "Advanced",
   "Algorithm": "Algorithm",
   "Always show message timestamps": "Always show message timestamps",