Doc: Update screenshots with new number or of the Welcome mode

Change-Id: I5685c9b42e31cdad79a7f6a6a90e4754a5f76cbc
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

doc/qtcreator/src/editors/creator-only/creator-coding-edit-mode.qdoc

@@ -184,7 +184,8 @@
 
     \title Move between files
 
-    The editor toolbar shows the file that is currently open (1) in the editor.
+    The editor toolbar shows the name of the file that is currently open (1) in
+    the editor.
 
     \image qtcreator-editor-open-files.webp {Current file shown on Edit mode toolbar}
 

doc/qtcreator/src/howto/creator-sessions.qdoc

@@ -59,7 +59,7 @@
 
     To manage sessions, select \uicontrol File > \uicontrol Sessions > \uicontrol Manage.
 
-    \image qtcreator-session-manager.png
+    \image qtcreator-session-manager.png {Session Manager}
 
     To save a session under a new name, select \uicontrol Clone.
 
@@ -96,7 +96,7 @@
     \key Ctrl+Alt+<number>, where \e <number> is the number of the session to
     open (available for the first nine sessions).
 
-    \image qtcreator-welcome-session.png
+    \image qtcreator-welcome-session.webp {Sessions in the Welcome mode}
 
     To view more information about a session, select the down arrow icon that
     appears when you move the mouse cursor over the session name. Select actions

doc/qtcreator/src/user-interface/creator-only/creator-how-to-show-and-hide-sidebars.qdoc

@@ -15,7 +15,7 @@
 
     Select views in the sidebar menu (1):
 
-    \image qtcreator-sidebar.png
+    \image qtcreator-sidebar.webp {Views open in the sidebar}
 
     You can change the view of the sidebars in the following ways: