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/rtwindow.cc

@@ -704,6 +704,7 @@ void RTWindow::MoveFileBrowserToEditor()
         FileCatalog *fCatalog = fpanel->fileCatalog;
         fpanel->ribbonPane->remove(*fCatalog);
         epanel->catalogPane->add(*fCatalog);
+        epanel->showTopPanel(options.editorFilmStripOpened);
         fCatalog->enableTabMode(true);
         fCatalog->refreshHeight();
         fCatalog->tbLeftPanel_1_visible(false);