Transform: a percentage typed alone in W or H scales the size it shows (fixes #2401)

docs/target-app-parity.md

@@ -455,7 +455,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - Dialogs move by dragging their heading (the band down from the top edge, as a title bar), stay on screen and keep where they were moved for the session; the form dialogs' choices are dropdowns (Offset Path's Joins, Average's and Shear's and Reflect's axis), and Offset Path lists Offset, Joins, Miter Limit and previews (#423).
   - Dialogs open with their first field focused and its value selected: type a value and press Enter (Move, Rotate, Scale…). A dialog opened from a menu takes the keyboard focus every time it opens, not only the first (#1367), and one whose first field starts greyed out (Blend Options on Smooth Color, Layers Panel Options) gives the focus to that field once it is enabled (#1395). Number fields in panels, the Control bar and dialogs (preferences too) step with Up/Down, or with the mouse wheel over the focused field (#485: a notch a step; the panel under it then stays put, and an unfocused field leaves the wheel to scrolling) (Shift: ten, Ctrl/Cmd: a tenth of their unit), applied at once.
   - Scrubby labels (#400, beyond Illustrator, as in Photoshop): dragging a numeric field's label left or right (the ↔ cursor shows over it) steps the value one unit every 2 points (Shift: ten, Ctrl/Cmd: a tenth; counts stay whole), in the field's unit and within its limits, applied live as the art follows; the whole drag is one undo step and Escape puts the value back. A click on the label focuses the field; the text box itself never scrubs, and a field with no label doesn't. Text labels before a field (Transform, Properties, Control bar, Stroke, Transparency, form rows in dialogs) and the Character and Paragraph panels' icons act as labels. Preferences › General › Scrub Numeric Fields by Dragging (on by default) turns it off.
-  - In the Transform panel, the Properties panel's Transform section and the Control bar, Alt+Enter (Option+Return) applies a value to a copy of the selection and selects the copy, in one undo step. With anchor points selected with Direct Selection it applies the value to them, as Enter does. Ctrl/Cmd+Enter in W or H applies the value and scales the selection proportionally with the link off. With the Artboard tool, it scales the active artboard proportionally.
+  - In the Transform panel, the Properties panel's Transform section and the Control bar, Alt+Enter (Option+Return) applies a value to a copy of the selection and selects the copy, in one undo step. With anchor points selected with Direct Selection it applies the value to them, as Enter does. Ctrl/Cmd+Enter in W or H applies the value and scales the selection proportionally with the link off. With the Artboard tool, it scales the active artboard proportionally. A percentage typed alone in W or H (`50%`) is that share of the size the field shows, and the link and Ctrl/Cmd+Enter keep the proportions as with a length (#2401).
   - The Control bar's underlined Transform link opens the Transform panel in a popover under it (reference point, X/Y/W/H, Rotate and Shear with their icons and angle presets, flips, shape properties, Scale Corners and Scale Strokes & Effects), as its Stroke link does the Stroke panel; X/Y/W/H also show inline while the bar has room. The reference point locator is nine squares, the outer eight joined around the box.
   - In isolation mode the Control bar has an Exit Isolation Mode button (`object.exitIsolation`), except while a pattern is edited. Outside isolation mode, with one group, compound path, path, image, mesh or placed file selected, it has an Isolate Selected Object button (`object.isolate`), which also isolates a path inside a group that Direct Selection selected.
   - Tab shows and hides the panels (in the Type tool it types a tab) without moving the keyboard focus onto a field, so the next shortcut or letter still works; in dialogs and panel fields it moves between fields.