activity_setting: fine tune layout style

For multiple users it helps to
keep track about who did what.

app/src/main/res/values/strings.xml

@@ -79,7 +79,7 @@
 
     <string name="settings_title">Settings</string>
     <string name="settings_signature">Signature</string>
-    <string name="settings_signature_desc">Attach a signature to each event your create and for others to see. Useful if multiple people add events.</string>
+    <string name="settings_signature_desc">Attach a signature to each event you create and for others to see. Useful if multiple people add events.</string>
     <string name="settings_storage">Choose where to save data</string>
     <string name="settings_storage_local">On device</string>
     <string name="settings_storage_local_desc">Most privacy-friendly solution: data doesn\'t leave your device</string>