Alternate title: _Applying #6684-similar fix to stroke_
#6684 makes sure the "current" transformation, at the moment of filling radial gradients is the `baseTransform` (that of the rescource (page), as it says in the specs). However, this should also be fixed in [`CanvasGraphics_stroke`](https://github.com/dsprenkels/pdf.js/blob/a9081653fc565eb72c3eb5142c17088cb162e7ce/src/display/canvas.js#L1052).

const coords = mesh.coords;
    const colors = mesh.colors;
    const ps = new Int32Array(16); 
    const cs = new Int32Array(4); 
    while (reader.hasData) {
      const f = reader.readFlag();
      if (!(0 <= f && f <= 3)) {
        throw new FormatError("Unknown type7 flag");
      }
      const pi = coords.length;
      for (let i = 0, ii = f !== 0 ? 12 : 16; i < ii; i++) {
        coords.push(reader.readCoordinate());
      }
      const ci = colors.length;
      for (let i = 0, ii = f !== 0 ? 2 : 4; i < ii; i++) {
        colors.push(reader.readComponents());
      }
      let tmp1, tmp2, tmp3, tmp4;
      switch (f) {
        
        case 0:
          ps[12] = pi + 3; ps[13] = pi + 4;  ps[14] = pi + 5;  ps[15] = pi + 6;
          ps[ 8] = pi + 2; ps[ 9] = pi + 13; ps[10] = pi + 14; ps[11] = pi + 7;
          ps[ 4] = pi + 1; ps[ 5] = pi + 12; ps[ 6] = pi + 15; ps[ 7] = pi + 8;