FX.75 Vector layout: palette icon highlight no longer spans neighbouring tools

In the Vector layout the Basic palette's icons overlapped: the pressed Select cell was highlighted across Select and Hand together, and the Tool Sets rows were squeezed. The ribbon rule for compact tools (min width 5.2rem, dense height 1.25rem) outranked the palette's own sizing, so each cell rendered 83 x 20 px. The palette rules in assets/css/app-workspace.css now sit under .vw-toolpalette and win over it: every Basic cell is a 40 x 40 square lit on its own, and Tool Sets rows keep their height. One stylesheet, so all eight apps. Checked by measuring the cells in ModelCraft in a headless browser; the screenshot showed one lit cell.