cleanup: Remove remaining CSS, JS .new-style references.

web/e2e-tests/lib/common.ts

@@ -538,7 +538,7 @@ export async function open_streams_modal(page: Page): Promise<void> {
     await page.waitForSelector(all_streams_selector, {visible: true});
     await page.click(all_streams_selector);
 
-    await page.waitForSelector("#subscription_overlay.new-style", {visible: true});
+    await page.waitForSelector("#subscription_overlay", {visible: true});
     const url = await page_url_with_fragment(page);
     assert.ok(url.includes("#channels/notsubscribed"));
 }

web/styles/message_row.css

@@ -659,8 +659,7 @@
     }
 
     &:disabled {
-        /* Replicate the `.new-style` disabled values,
-           without any color shifts. */
+        /* Replicate disabled values, without any color shifts. */
         cursor: not-allowed;
         opacity: 0.5;
     }

web/styles/settings.css

@@ -713,7 +713,7 @@ input[type="checkbox"] {
     #show-add-default-streams-modal {
         /* We want this button to have the same height as the filter
            button on its right. We're overriding the default vertical
-           padding of `.new-style` and setting it to 0. Having the
+           button padding and setting it to 0. Having the
            height fixed will mean that the vertical whitespace will
            adjust itself for different font-sizes without changing the
            height.

web/styles/widgets.css

@@ -49,7 +49,7 @@
         display: flex; /* Arrange that a multi-line description line wraps properly. */
         /* Keep checkboxes vertically aligned, including with multi-line tasks. */
         align-items: baseline;
-        /* Reset things from .new-style */
+        /* Reset default label.checkbox styles. */
         gap: 5px;
         position: static;
         min-height: 0;

web/templates/stream_settings/stream_settings_overlay.hbs

@@ -1,4 +1,4 @@
-<div id="subscription_overlay" class="overlay new-style" data-overlay="subscriptions">
+<div id="subscription_overlay" class="overlay" data-overlay="subscriptions">
     <div class="flex overlay-content">
         <div class="subscriptions-container overlay-container">
             <div class="subscriptions-header">