[simple-scan] Improve some help pages

[Bartosz <bkosiorek src gnome org>]

commit 70bf8ac76bb3d54a3ad60a7e3df423d12e980a73
Author: Sabri Ünal <libreajans gmail com>
Date:   Sat Dec 28 10:57:23 2019 +0000

    Improve some help pages
    
    Add a new image (preferences_quality.png) to show the quality page.
    Fix a lowercase title in brightness-cortrast.page.
    Add quality breadcrumb to dpi.page and brightness-cortrast.page.
    Change preferences.png media link to preferences_quality.png to show dpi settings in dpi.page.
    Add preferences_quality.png media link to brightness-cortrast.page to show Brightness and Contrast 
settings.
    Update scan_toolbar.png to get rid of Simple Scan title and to show the new Preferences option.

 help/C/brightness-contrast.page        |   7 +++++--
 help/C/dpi.page                        |   4 ++--
 help/C/figures/preferences_quality.png | Bin 0 -> 22398 bytes
 help/C/figures/scan_toolbar.png        | Bin 29962 -> 24466 bytes
 help/meson.build                       |   1 +
 5 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/help/C/brightness-contrast.page b/help/C/brightness-contrast.page
index 7f0c743..d218917 100644
--- a/help/C/brightness-contrast.page
+++ b/help/C/brightness-contrast.page
@@ -6,10 +6,13 @@
         <link type="guide" xref="index#acquire"/>
     </info>
 
-       <title>Setting brightness and Contrast</title>
+       <title>Setting Brightness and Contrast</title>
 
     <p>
     Some scanners allow the user to adjust the brightness and contrast when scanning.
-    If your scans come out too dark or too light you can adjust these settings from the 
<guiseq><gui>Document</gui><gui>Preferences</gui></guiseq> menu.
+    If your scans come out too dark or too light you can adjust these settings from the 
+    <guiseq><gui>Document</gui><gui>Preferences</gui><gui>Quality</gui></guiseq> menu.
     </p>
+    <media type="image" src="figures/preferences_quality.png"/>
+    
 </page>
diff --git a/help/C/dpi.page b/help/C/dpi.page
index ea8deeb..f9f610c 100644
--- a/help/C/dpi.page
+++ b/help/C/dpi.page
@@ -11,9 +11,9 @@
     <p>
     The default resolution for document type <gui><em>Text</em></gui> is 150 dpi (dots per inch)
     and for document type <gui><em>Photo</em></gui> is 300 dpi. You can change these settings
-    from the <guiseq><gui>Document</gui><gui>Preferences</gui></guiseq> menu.
+    from the <guiseq><gui>Document</gui><gui>Preferences</gui><gui>Quality</gui></guiseq> menu.
     </p>
-    <media type="image" src="figures/preferences.png"/>
+    <media type="image" src="figures/preferences_quality.png"/>
     
     <p>The available scanning resolutions for both document types (Text and Photo) are the same
     and are listed in the following table:</p>
diff --git a/help/C/figures/preferences_quality.png b/help/C/figures/preferences_quality.png
new file mode 100644
index 0000000..050e12e
Binary files /dev/null and b/help/C/figures/preferences_quality.png differ
diff --git a/help/C/figures/scan_toolbar.png b/help/C/figures/scan_toolbar.png
index d4d4ab8..fad081f 100644
Binary files a/help/C/figures/scan_toolbar.png and b/help/C/figures/scan_toolbar.png differ
diff --git a/help/meson.build b/help/meson.build
index 7eaed45..8895d12 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -18,5 +18,6 @@ gnome.yelp ('simple-scan',
                        'scanning.page' ],
             media: [ 'figures/icon.svg',
                      'figures/preferences.png',
+                     'figures/preferences_quality.png',
                      'figures/scan_toolbar.png' ],
             symlink_media: false)