Doc: Add conditions to hide broken links in the QDS Manual

The linked topics are not included in the QDS Manual.

Change-Id: If2bfb1dbc4478a924e56f6dcce840a80c83f19e8
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

doc/qtcreator/src/howto/creator-keyboard-shortcuts.qdoc

@@ -433,15 +433,19 @@
         \row
             \li  Find references to symbol under cursor
             \li  Ctrl+Shift+U
+                 \if defined(qtcreator)
                  \note If this keyboard shortcut does not work on Linux, see
                  \l {Editing Issues}.
+                 \endif
         \row
             \li  Follow symbol under cursor
 
                Works with namespaces, classes, functions, variables, include
                statements, and macros. Also, opens URLs in the default browser
+               \if defined(qtcreator)
                and Qt resource files (.qrc) in the \l{Resource Files}
                {resource editor}
+               \endif
             \li  F2
         \row
             \li  Rename symbol under cursor

doc/qtcreator/src/user-interface/creator-file-system-view.qdoc

@@ -60,9 +60,12 @@
         \li Open a terminal window in the selected directory or in the directory
             that has the file. To specify the terminal to use on Linux and
             \macos, select \uicontrol Edit > \uicontrol Preferences >
-            \uicontrol Environment > \uicontrol System. To use an \l{Terminal}
-            {internal terminal}, select \uicontrol Edit > \uicontrol Preferences
-            > \uicontrol Terminal > \uicontrol {Use internal terminal}.
+            \uicontrol Environment > \uicontrol System.
+            \if defined(qtcreator)
+            To use an \l{Terminal} {internal terminal}, select \uicontrol Edit >
+            \uicontrol Preferences > \uicontrol Terminal >
+            \uicontrol {Use internal terminal}.
+            \endif
         \li Search from the selected directory.
         \li View file properties, such as name, path, MIME type, default editor,
             line endings, indentation, owner, size, last read and modified

doc/qtcreator/src/user-interface/creator-projects-view.qdoc

@@ -79,14 +79,16 @@
         \li Add and remove subprojects.
         \li Find unused functions.
         \endif
-
         \li Search from the selected directory.
+
         \li Open a terminal window in the project directory. To specify the
             terminal to use on Linux and \macos, select \uicontrol Edit >
             \uicontrol Preferences > \uicontrol Environment > \uicontrol System.
+            \if defined(qtcreator)
             To use an \l{Terminal}{internal terminal}, select \uicontrol Edit >
             \uicontrol Preferences > \uicontrol Terminal >
             \uicontrol {Use internal terminal}.
+            \endif
         \li Open a terminal window in the project directory that you configured
             for building or running the project.
         \li Expand or collapse the tree view to show or hide all files and