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/options.h

@@ -109,6 +109,7 @@ class Options {
     int browserToolPanelHeight;
     bool browserToolPanelOpened;
     bool browserDirPanelOpened;
+    bool editorFilmStripOpened;
     int historyPanelWidth;
     Glib::ustring font;
     int windowWidth;
@@ -187,7 +188,9 @@ class Options {
 
     std::vector<double> thumbnailZoomRatios;
     bool overlayedFileNames;
+    bool filmStripOverlayedFileNames;
     bool showFileNames;
+    bool filmStripShowFileNames;
     bool tabbedUI;
     int previewSizeTab,previewSizeBrowser;
     int multiDisplayMode;  // 0=none, 1=Edit panels on other display
@@ -210,6 +213,8 @@ class Options {
     bool UseIconNoText;
     int whiteBalanceSpotSize;
 
+    bool showFilmStripToolBar;
+
     Glib::ustring clutsDir;
 
     // Performance options