Core: Let callers specify which part of an options page to pre-select

... and use it for the "Manage kits" functionality.
We will make use of this in other contexts as well.

Task-number: QTCREATORBUG-25077
Change-Id: I79c622075b9385b060aed73534d39acc23fd765e
Reviewed-by: hjk <hjk@qt.io>

src/plugins/coreplugin/icore.cpp

@@ -477,6 +477,24 @@ bool ICore::showOptionsDialog(const Id page, QWidget *parent)
     return executeSettingsDialog(parent ? parent : dialogParent(), page);
 }
 
+/*!
+    Opens the options dialog on the specified \a page. The dialog's \a parent
+    defaults to dialogParent(). If the dialog is already shown when this method
+    is called, it is just switched to the specified \a page.
+    Pre-selects some part of the dialog specified by \a item which the dialog
+    knows how to interpret.
+
+    Returns whether the user accepted the dialog.
+
+    \sa msgShowOptionsDialog()
+    \sa msgShowOptionsDialogToolTip()
+*/
+bool ICore::showOptionsDialog(const Utils::Id page, Utils::Id item, QWidget *parent)
+{
+    setPreselectedOptionsPageItem(page, item);
+    return showOptionsDialog(page, parent);
+}
+
 /*!
     Returns the text to use on buttons that open the options dialog.