Debugger: Add memory views.

Add a separate memory view tool window available
from the context menus of:

Locals view:
   If the debugger provides size information, colors the
   areas of member variables for inspecting class layouts.

Registers view:
   Tracks the area pointed to by a register.

The view has a context menu allowing to open subviews
referenced by the pointer at the location using
the toolchain abi's word with/endianness.

Rubber-stamped-by: hjk

src/plugins/debugger/debuggerengine.cpp

@@ -1573,6 +1573,11 @@ void DebuggerEngine::openMemoryView(quint64 address)
     d->m_memoryAgent.createBinEditor(address);
 }
 
+void DebuggerEngine::addMemoryView(Internal::MemoryViewWidget *w)
+{
+    d->m_memoryAgent.addMemoryView(w);
+}
+
 void DebuggerEngine::updateMemoryViews()
 {
     d->m_memoryAgent.updateContents();