Optimize the display

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/clocks.c b/clocks.c
index 93dd4b3..59db8a7 100644
--- a/clocks.c
+++ b/clocks.c
@@ -295,7 +295,7 @@
 		     "Name", "Flags", "Rate", "Usecount", "Children") < 0)
 		return -1;
 
-	ret = display_header_footer(CLOCK, buf);
+	ret = display_column_name(buf);
 
 	free(buf);
 
diff --git a/display.c b/display.c
index 43f3797..be78ce0 100644
--- a/display.c
+++ b/display.c
@@ -293,12 +293,12 @@
 
 	case KEY_RIGHT:
 	case '\t':
-		display_next_panel();
+		display_show_header(display_next_panel());
 		break;
 
 	case KEY_LEFT:
 	case KEY_BTAB:
-		display_prev_panel();
+		display_show_header(display_prev_panel());
 		break;
 
 	case KEY_DOWN:
@@ -429,21 +429,15 @@
 	return display_refresh(wdefault);
 }
 
-int display_header_footer(int win, const char *line)
+int display_column_name(const char *line)
 {
-	int ret;
-
 	werase(main_win);
 	wattron(main_win, A_BOLD);
 	mvwprintw(main_win, 0, 0, "%s", line);
 	wattroff(main_win, A_BOLD);
 	wrefresh(main_win);
 
-	ret = display_show_header(win);
-	if (ret)
-		return ret;
-
-	return display_show_footer(win);
+	return 0;
 }
 
 int display_register(int win, struct display_ops *ops)
diff --git a/display.h b/display.h
index 8586f5e..f9a762c 100644
--- a/display.h
+++ b/display.h
@@ -29,5 +29,5 @@
 
 extern int display_init(int wdefault);
 extern int display_register(int win, struct display_ops *ops);
-extern int display_header_footer(int win, const char *line);
 extern int display_refresh(int win);
+extern int display_column_name(const char *line);
diff --git a/regulator.c b/regulator.c
index c8cbe2d..97ab15b 100644
--- a/regulator.c
+++ b/regulator.c
@@ -148,7 +148,7 @@
 		     "Min u-volts", "Max u-volts") < 0)
 		return -1;
 
-	ret = display_header_footer(REGULATOR, buf);
+	ret = display_column_name(buf);
 
 	free(buf);
 
diff --git a/sensor.c b/sensor.c
index 399605b..2a8f4bb 100644
--- a/sensor.c
+++ b/sensor.c
@@ -243,7 +243,7 @@
 	if (asprintf(&buf, "%-36s%s", "Name", "Value") < 0)
 		return -1;
 
-	ret = display_header_footer(SENSOR, buf);
+	ret = display_column_name(buf);
 
 	free(buf);