Fix GNOME Dash to Dock v103 auto-hide broken after update

Problem: GNOME Dash to Dock v103 broke auto-hide: the dock stops hiding when windows are maximized or fullscreen. Root cause is a bad coordinate fix in PR #2447 that miscalculates the dock's transformed position on one axis.

Quick bash fix (run in terminal, then re-login):

cd ~/.local/share/gnome-shell/extensions/dash-to-dock@micxgx.gmail.com
sed -i 's/const \[absX, absY\] = this\._box\.get_transformed_position();//' docking.js
sed -i 's/            absX,/            this.x + this._slider.x - (this._position === St.Side.RIGHT ? this._box.width : 0),/' docking.js
sed -i 's/            absY,/            this.y + this._slider.y - (this._position === St.Side.BOTTOM ? this._box.height : 0),/' docking.js

Or a targeted JS patch in docking.js — use only the x coordinate from get_transformed_position() and compute y from slider position:

const [absX] = this._box.get_transformed_position();

this.staticBox.init_rect(
    absX,
    this.y + this._slider.y - (this._position === St.Side.BOTTOM ? this._box.height : 0),
    this._box.width,
    this._box.height
);

Alternative: Downgrade to v102 by downloading the zip, replacing the extension folder, then setting "version": 103 in metadata.json to prevent auto-update.