Utils: Make aspect settings access implicit

Generally, aspects should use fromMap/toMap, but some older pages
use {from,to}Settings with always the same ICore::settings().

To make that less intrusive on the user code side, make that globally
implicit.

Task-number: QTCREATORBUG-29167
Change-Id: I29a8e23a31eb8061bb143e93931a07c6741eb7f9
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggeractions.h

@@ -32,8 +32,8 @@ public:
 
     void addToLayout(Layouting::LayoutItem &parent) override;
 
-    void readSettings(const QSettings *settings) override;
-    void writeSettings(QSettings *settings) const override;
+    void readSettings() override;
+    void writeSettings() const override;
 
 private:
     void guiToInternal() override;