feat(service_menu): glyphs () + tanca picker al seleccionar mando

Afegim els glyphs ( i ) a VectorText (char_lparen.shp, char_rparen.shp,
arcs de 4 trams dins la caixa 20x40) perque el sufix (P1)/(P2) de la
picker de mando es renderitze net sense warnings.

A mes, al triar un mando o "SENSE MANDO" a la picker fem popPage
automatic, perque l'usuari no haja de tornar enrere a ma després
d'una assignacio.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

source/core/system/service_menu.cpp

@@ -631,8 +631,9 @@ namespace System {
                 .label_key = {},
                 .label_text = std::move(label),
                 .selectable = true,
-                .on_activate = [PI, PAD_NAME, PAD_PATH] {
+                .on_activate = [this, PI, PAD_NAME, PAD_PATH] {
                     assignPadToPlayer(PI, PAD_NAME, PAD_PATH);
+                    popPage();
                 },
                 .get_value_text = {},
                 .on_change = {},
@@ -646,7 +647,10 @@ namespace System {
             .label_key = "service_menu.controls_no_pad",
             .label_text = {},
             .selectable = true,
-            .on_activate = [PI] { assignPadToPlayer(PI, {}, {}); },
+            .on_activate = [this, PI] {
+                assignPadToPlayer(PI, {}, {});
+                popPage();
+            },
             .get_value_text = {},
             .on_change = {},
         });