debugger: move logical ownership of breakhandler from engines to plugin

src/plugins/debugger/debuggerconstants.h

@@ -184,6 +184,7 @@ enum ModelRoles
     EngineCapabilitiesRole,
     EngineActionsEnabledRole,
     RequestActivationRole,
+    RequestContextMenuRole,
 
     // Running
     RequestExecContinueRole,
@@ -205,25 +206,6 @@ enum ModelRoles
     RequestOperatedByInstructionTriggeredRole,
     RequestExecuteCommandRole,
 
-    // Breakpoints
-    BreakpointRole,
-    BreakpointEnabledRole,
-    BreakpointUseFullPathRole,
-    BreakpointFunctionNameRole,
-    BreakpointFileNameRole,
-    BreakpointConditionRole,
-    BreakpointIgnoreCountRole,
-    BreakpointThreadSpecRole,
-    RequestActivateBreakpointRole,
-    RequestRemoveBreakpointByIndexRole,
-    RequestSynchronizeBreakpointsRole,
-    RequestBreakByFunctionRole,
-    RequestBreakByFunctionMainRole,
-    RequestBreakpointRole,
-    RequestToggleBreakpointRole,
-    RequestToggleBreakpointEnabledRole,
-    RequestContextMenuRole,
-
     // Locals and Watchers
     LocalsINameRole,
     LocalsEditTypeRole,     // A QVariant::type describing the item
@@ -254,7 +236,6 @@ enum ModelRoles
     RequestShowDisassemblerRole,
 
     // Threads
-    CurrentThreadIdRole,
     RequestSelectThreadRole,
 
     // Modules