Add CTRL+SHFT+TAB shortcut

main.odin

@@ -364,7 +364,7 @@ update :: proc(app: ^App) {
 		current_file.scroll_y = max(0, current_file.scroll_y)
 
 		// Handle keyboard shortcuts
-		if rl.IsKeyDown(.LEFT_CONTROL) {
+		if rl.IsKeyDown(.LEFT_CONTROL) || rl.IsKeyDown(.RIGHT_CONTROL) {
 			if rl.IsKeyPressed(.S) {
 				save_file(current_file)
 			}
@@ -378,7 +378,11 @@ update :: proc(app: ^App) {
 				paste_text(current_file, app.copied_text)
 			}
 			if rl.IsKeyPressed(.TAB) {
-				app.active_tab = (app.active_tab + 1) % len(app.files)
+				if rl.IsKeyDown(.LEFT_SHIFT) || rl.IsKeyDown(.RIGHT_SHIFT) {
+					app.active_tab = (app.active_tab - 1) % len(app.files)
+				} else {
+					app.active_tab = (app.active_tab + 1) % len(app.files)
+				}
 			}
 		}