docs: the manual and the user guide describe the badge bar, the dock and the slide-over pages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

help/C/org.udpscope.app/cursors.page

@@ -22,12 +22,13 @@
     <title>How to reach it</title>
     <steps>
       <item>
-        <p>Press the cursors button in the toolbar, or <key>c</key>.</p>
+        <p>Press the cursors button in the header bar, or <key>c</key>. It switches the cursors on
+        and off.</p>
       </item>
       <item>
-        <p>The readings are in the side panel (a read-only copy) and in the cursors panel, which
-        <gui>Edit</gui> beside <gui>Cursors</gui> opens over the plot and which owns a
-        <gui>Reset</gui> button. Drag a marker to move it.</p>
+        <p>The readings are in the dock (a read-only copy) and on the <gui>Cursors</gui> page, which
+        <gui>Edit</gui> beside <gui>Cursors</gui> opens over the plot and which owns the mode
+        and a <gui>Reset</gui> button. Drag a marker to move it.</p>
       </item>
       <item>
         <p>The mode dropdown offers four modes: <gui>vertical</gui> (the shared time pair),