miral-shell doesn't work with breeze X cursor theme

Since -r 557 it is possible to workaround this with:

$ miral-shell --cursor-theme DMZ-White

Fix committed into lp:miral at revision None, scheduled for release in miral, milestone Unknown

Linked branch mitigates the impact, but doesn't fix the underlying problem

OK, the reason for this is that MirAL is looking for cursor images of Mir's default 24x24 size and not finding any.

For example, redglass has:

Image: crosshair, size=32x32
Image: draft_large, size=27x32
Image: shuttle, size=43x64
Image: center_ptr, size=32x32
Image: left_side, size=32x29
Image: watch, size=29x32
Image: watch, size=29x32
Image: watch, size=29x32
Image: watch, size=29x32
Image: watch, size=29x32
Image: watch, size=32x32
Image: watch, size=32x32
Image: watch, size=32x32
Image: draft_small, size=27x32
Image: cross_reverse, size=32x32
Image: plus, size=32x32
Image: double_arrow, size=32x32
Image: ll_angle, size=32x29
Image: dot, size=32x32
Image: fleur, size=36x36
Image: left_tee, size=32x29
Image: sb_up_arrow, size=32x32
Image: right_tee, size=32x32
Image: bottom_right_corner, size=32x29
Image: arrow, size=27x32
Image: cross, size=32x32
Image: bottom_side, size=32x32
Image: sb_right_arrow, size=32x30
Image: hand2, size=36x36
Image: top_side, size=32x32
Image: right_side, size=27x32
Image: X_cursor, size=32x32
Image: top_right_corner, size=32x32
Image: bottom_left_corner, size=32x29
Image: xterm, size=32x32
Image: top_left_corner, size=32x32
Image: draped_box, size=32x32
Image: based_arrow_down, size=32x32
Image: circle, size=32x32
Image: dotbox, size=32x32
Image: left_ptr_watch, size=48x32
Image: left_ptr_watch, size=32x32
Image: gumby, size=24x32
Image: bottom_tee, size=32x29
Image: sb_h_double_arrow, size=36x32
Image: sb_v_double_arrow, size=32x32
Image: top_left_arrow, size=32x32
Image: pencil, size=36x36
Image: left_ptr, size=32x32
Image: tcross, size=32x32
Image: based_arrow_up, size=32x31
Image: 08e8e1c95fe2fc01f976f1e063a24ccd, size=48x32
Image: 08e8e1c95fe2fc01f976f1e063a24ccd, size=32x32
Image: right_ptr, size=27x32

Fix committed into lp:miral at revision None, scheduled for release in miral, milestone Unknown