Fix the (Windows) crash in the suggestions menu (Fixes: #1980).

Now I use fixed wxWidgets IDs. Maybe the reserved IDs were
(automatically?) unreserved???
Sometimes it worked first, but a second right mouse click
in the same position caused the assert()?

Not really elegant, but maybe thats the better solution. Maybe all
IDs should be reserved with an enum{}? Many wxWidgets samples
do the same (and do not use NewControlId()).

src/EventIDs.cpp

@@ -645,7 +645,6 @@ const wxWindowIDRef EventIDs::popid_unfold(wxWindow::NewControlId());
 const wxWindowIDRef EventIDs::popid_maxsizechooser(wxWindow::NewControlId());
 const wxWindowIDRef EventIDs::popid_resolutionchooser(wxWindow::NewControlId());
 const wxWindowIDRef EventIDs::popid_reloadimage(wxWindow::NewControlId());
-const wxWindowIDRef EventIDs::popid_suggestion1(wxWindow::NewControlId(NumberOfSuggestions()));
 const wxWindowIDRef EventIDs::popid_hide_tooltipMarker(wxWindow::NewControlId());
 const wxWindowIDRef EventIDs::popid_hide_tooltipMarkerForThisMessage(wxWindow::NewControlId());
 const wxWindowIDRef EventIDs::popid_property_real(wxWindow::NewControlId());

src/EventIDs.h

@@ -710,16 +710,19 @@ class EventIDs
   static const wxWindowIDRef popid_maxsizechooser;
   static const wxWindowIDRef popid_resolutionchooser;
   static const wxWindowIDRef popid_reloadimage;
-  static const wxWindowIDRef popid_suggestion1;
-  static const wxWindowIDRef popid_suggestion2;
-  static const wxWindowIDRef popid_suggestion3;
-  static const wxWindowIDRef popid_suggestion4;
-  static const wxWindowIDRef popid_suggestion5;
-  static const wxWindowIDRef popid_suggestion6;
-  static const wxWindowIDRef popid_suggestion7;
-  static const wxWindowIDRef popid_suggestion8;
-  static const wxWindowIDRef popid_suggestion9;
-  static const wxWindowIDRef popid_suggestion10;
+
+  enum {
+    popid_suggestion1 = wxID_HIGHEST+1,
+    popid_suggestion2,
+    popid_suggestion3,
+    popid_suggestion4,
+    popid_suggestion5,
+    popid_suggestion6,
+    popid_suggestion7,
+    popid_suggestion8,
+    popid_suggestion9,
+    popid_suggestion10
+  };
   static const wxWindowIDRef popid_hide_tooltipMarker;
   static const wxWindowIDRef popid_hide_tooltipMarkerForThisMessage;
   static const wxWindowIDRef popid_property_real;