Solving issue 2161: "Hide Filmstrip elements"

"t" has been remapped to "Ctrl+t" to show the content of the Trash
"t" now show/hide the film strip and update the size of the allocated space
"Shift-t" show/hide the film strip and keep the allocated space identical, preventing a main preview refresh

rtgui/thumbbrowserbase.h

@@ -53,6 +53,14 @@ class ThumbBrowserBase  :  public Gtk::VBox {
             bool isDirty  () { return dirty; }
     };
 
+  public:
+
+    enum eLocation {
+        THLOC_BATCHQUEUE,
+        THLOC_FILEBROWSER,
+        THLOC_EDITOR
+    } location;
+
   protected:
     virtual int getMaxThumbnailHeight() const { return options.maxThumbnailHeight; }  // Differs between batch and file
     virtual void saveThumbnailHeight (int height)=0;
@@ -64,8 +72,6 @@ class ThumbBrowserBase  :  public Gtk::VBox {
     
     int inW, inH;
 
-    bool inTabMode;  // Tab mode has e.g. different preview heights
-
     void resizeThumbnailArea (int w, int h);
     void internalAreaResized (Gtk::Allocation& req);
     void buttonPressed (int x, int y, int button, GdkEventType type, int state, int clx, int cly, int clw, int clh);
@@ -83,6 +89,8 @@ class ThumbBrowserBase  :  public Gtk::VBox {
     void selectFirst (bool enlarge);
     void selectLast (bool enlarge);
 
+    eLocation getLocation() { return location; }
+
   protected:
 
     int eventTime;