T65: round 2 of its review passes

TASKS.md

@@ -158,7 +158,7 @@ Progress truth. Top to bottom, one at a time. A task is ticked only after its co
 - [x] T61 On Windows the IME's candidate window stays at the cursor, which a user found jumping after 0.1.6: find why it moves, fix the cause, and log what the input handler tells the IME. Not reproduced on the owner's PC, so the owner closed it; the caret the IME is told is logged.
 - [x] T62 Ely's body runs on below the edge she holds, which a user asked for after 0.1.6, where a hop lifted her off the window and left a gap under her collar: her shirt continues down, hidden behind the edge, so a hop shows more of her and never a gap.
 - [x] T63 A double-click on a session's title renames it, which a user asked for after 0.1.6: the row's title turns into a field, Enter keeps the name, Escape drops it; the name shows in the row, the terminal's header and the window's title over the program's own until renamed again, and an empty name gives the title back to the program; it lives as long as the session.
-- [ ] T65 Dragging the window on Windows 10 with Background blur on follows the pointer, which a user found lagging seconds behind in issue #3 after 0.1.5: find where the lag comes from in gpui's acrylic path, fix the cause on Windows 10 alone, log what changes, and reply on the issue.
+- [x] T65 Dragging the window on Windows 10 with Background blur on follows the pointer, which a user found lagging seconds behind in issue #3 after 0.1.5: find where the lag comes from in gpui's acrylic path, fix the cause on Windows 10 alone, log what changes, and reply on the issue.
 
 ## 33. Release