Scroll to 'top/bottom' by only 10 at a time

Prevents a nasty device lockup when scrolling infinite lists

src/tangara/input/input_hook_actions.cpp

@@ -34,14 +34,14 @@ auto scrollDown() -> HookCallback {
 
 auto scrollToTop() -> HookCallback {
   return HookCallback{.name = "scroll_to_top", .fn = [&](lv_indev_data_t* d) {
-                        d->enc_diff = INT16_MIN;
+                        d->enc_diff = -10;
                       }};
 }
 
 auto scrollToBottom() -> HookCallback {
   return HookCallback{
       .name = "scroll_to_bottom",
-      .fn = [&](lv_indev_data_t* d) { d->enc_diff = INT16_MAX; }};
+      .fn = [&](lv_indev_data_t* d) { d->enc_diff = 10; }};
 }
 
 auto goBack() -> HookCallback {

src/tangara/input/input_touch_wheel.cpp

@@ -40,9 +40,13 @@ TouchWheel::TouchWheel(drivers::NvsStorage& nvs, drivers::TouchWheel& wheel)
                      return true;
                    }),
       centre_("centre", actions::select(), {}, {}, {}),
-      up_("up", {}, {}, actions::scrollToTop(), {}),
+      up_("up", {}, {}, actions::scrollToTop(), actions::scrollToTop()),
       right_("right", {}),
-      down_("down", {}, {}, actions::scrollToBottom(), {}),
+      down_("down",
+            {},
+            {},
+            actions::scrollToBottom(),
+            actions::scrollToBottom()),
       left_("left", {}, {}, actions::goBack(), {}),
       is_scrolling_(false),
       threshold_(calculateThreshold(nvs.ScrollSensitivity())),