Freq quick buttons corrected

ui.c

@@ -1832,10 +1832,10 @@ draw_menu_buttons(const menuitem_t *menu)
       if (MT_MASK(menu[i].type) == MT_KEYPAD) {
         if (menu[i].data == KM_CENTER) {
           local_slider_positions =  LCD_WIDTH/2+setting.slider_position;
-          plot_printf(step_text_freq[0], sizeof step_text_freq[0], "-%3.1qHz", setting.slider_span);
-          plot_printf(step_text_freq[1], sizeof step_text_freq[1], "-%3.1qHz", setting.slider_span/10);
-          plot_printf(step_text_freq[3], sizeof step_text_freq[3], "+%3.1qHz", setting.slider_span/10);
-          plot_printf(step_text_freq[4], sizeof step_text_freq[4], "+%3.1qHz", setting.slider_span);
+          plot_printf(step_text_freq[0], sizeof step_text_freq[0], "-%3.0FHz", (float)setting.slider_span);
+          plot_printf(step_text_freq[1], sizeof step_text_freq[1], "-%3.0FHz", (float)setting.slider_span/10);
+          plot_printf(step_text_freq[3], sizeof step_text_freq[3], "+%3.0FHz", (float)setting.slider_span/10);
+          plot_printf(step_text_freq[4], sizeof step_text_freq[4], "+%3.0FHz", (float)setting.slider_span);
           for (int i=0; i <= 4; i++) {
             ili9341_drawstring(step_text_freq[i], button_start+12 + i * MENU_FORM_WIDTH/5, y+button_height-9);
           }
@@ -2077,8 +2077,13 @@ menu_select_touch(int i, int pos)
         step = setting.slider_span;
         break;
       }
-      uistat.value = get_sweep_frequency(ST_CENTER) + step;
+      if (step < 0 && get_sweep_frequency(ST_CENTER) <  -step)
+        uistat.value = 0;
+      else
+        uistat.value = get_sweep_frequency(ST_CENTER) + step;
       do_exit = true;
+      setting.slider_position = 0;                         // reset slider after step
+      check_frequency_slider(uistat.value);
       goto apply_step;
     }