MD Settings: Display > Overscan: Update text and fix focus

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- About Page -->
   <message name="IDS_SETTINGS_ABOUT_PAGE_BROWSER_VERSION" desc="The text label describing the version of the browser, example: Version 57.0.2937.0 (Developer Build) unknown (64-bit)">
     Version <ph name="PRODUCT_VERSION">$1<ex>15.0.865.0</ex></ph> (<ph name="PRODUCT_CHANNEL">$2<ex>Developer Build</ex></ph>) <ph name="PRODUCT_MODIFIER">$3</ph> <ph name="PRODUCT_VERSION_BITS">$4</ph>
   </message>
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PAGE_DETAILED_BUILD_INFO" desc="Label describing the section that shows detailed information about the current Chrome build.">
       Detailed build information
@@ skipping 2631 matching lines @@
     </message>
     <message name="IDS_SETTINGS_DISPLAY_ORIENTATION" desc="In Device Settings > Displays, the label for the control for changing a display's orientation.">
       Orientation
     </message>
     <message name="IDS_SETTINGS_DISPLAY_ORIENTATION_STANDARD" desc="In Device Settings > Displays, the label for standard orientation (0 rotation).">
       Standard
     </message>
     <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_TEXT" desc="Text explaining that this setting is used to adjust the boundaries of the selected display.">
       Adjust the boundaries of your desktop within the display
     </message>
-    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_TITLE" desc="Name of the settings subpage which adjusts display overscan.">
+    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_TITLE" desc="Title of the settings subpage which adjusts display overscan.">
       Overscan
     </message>
-    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_INSTRUCTIONS" desc="Instructions for changing the overscan calibration.">
-      Use arrow keys to adjust picture size and alignment.
+    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_SUBTITLE" desc="Subtitle for the display overscan settings subpage.">
+      Adjust the boundaries of your display.
+    </message>
+    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_INSTRUCTIONS" desc="Instructions for changing the display overscan calibration.">
+      Tap the following keys to adjust or move the cropping area.
     </message>
     <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_RESIZE" desc="Label for resizing overscan calibration.">
-      Shrink/expand
+      Shrink / Expand
     </message>
     <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_POSITION" desc="Label for positioning overscan calibration.">
       Move
     </message>
     <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_RESET" desc="Label for resetting overscan calibration.">
       Reset
     </message>
-    <message name="IDS_SETTINGS_DISPLAY_OVERSCAN_SAVE" desc="Label for saving overscan calibration.">
-      Save
-    </message>
     <message name="IDS_SETTINGS_DISPLAY_MIRRORING_ON" desc="Label indicating that the displays are currently mirrored">
       On
     </message>
     <message name="IDS_SETTINGS_DISPLAY_MIRRORING_OFF" desc="Label indicating that the displays are currently not mirrored">
       Off
     </message>
 
     <!-- Storage -->
     <message name="IDS_SETTINGS_STORAGE_TITLE" desc="In Device Settings, the title for storage management.">
       Storage management
@@ skipping 60 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>