UI enhancement: new shortcuts for toolpanelcoord & browse path

Ctrl-e: exposure tab
Ctrl-d: detail tab
Ctrl-c: color tab
Ctrl-t: transform tab
Ctrl-r: raw tab
Ctrl-m: metadata tab

In file browser: Ctrl-O - sets focus in browse path entry box

rtgui/filepanel.cc

@@ -238,6 +238,9 @@ bool FilePanel::handleShortcutKey (GdkEventKey* event) {
     if(tpc->getToolBar()->handleShortcutKey(event))
         return true;
     
+    if(tpc->handleShortcutKey(event))
+        return true;
+
     if(fileCatalog->handleShortcutKey(event))
         return true;