Remove nested scrolling in profile watch history.

Removes the fixed height and overflow from the watch history container in the profile modal, allowing it to expand fully. Updates the profile modal controller to use the main modal panes container as the scroll root for infinite scrolling.

components/profile-modal.html

@@ -172,7 +172,7 @@
             data-profile-mobile-pane
             aria-hidden="true"
           >
-            <div class="profile-modal__panes">
+            <div id="profileModalPanes" class="profile-modal__panes">
             <section
               id="profilePaneAccount"
               class="profile-pane space-y-6"
@@ -861,7 +861,7 @@
                 >
                   You haven’t watched any videos yet.
                 </div>
-                <div id="profileHistoryScroll" class="relative max-h-profile-history overflow-y-auto pr-1">
+                <div id="profileHistoryScroll" class="relative">
                   <div
                     id="profileHistoryGrid"
                     class="grid-stack hidden"

js/ui/profileModalController.js

@@ -1501,7 +1501,7 @@ export class ProfileModalController {
       statusSelector: "#profileHistoryStatus",
       emptySelector: "#profileHistoryEmpty",
       sentinelSelector: "#profileHistorySentinel",
-      scrollContainerSelector: "#profileHistoryScroll",
+      scrollContainerSelector: "#profileModalPanes",
       errorBannerSelector: "#profileHistoryError",
       clearButtonSelector: "#profileHistoryClear",
       republishButtonSelector: "#profileHistoryRepublish",