Git commits in Moodle 3.7.x by David Balch

commit b74030550e8206f233f4bfccb7ea1b56af5e6550
Author: David Balch <david.balch@conted.ox.ac.uk>
Date:   Tue, 18 Feb 2020 20:24:05 +0800
Tag:    v3.7.5

MDL-67993 roles: Fix pix_icon() calls.


commit da37a3add181abbd775ed8172316aff4c9f11bb8
Author: David Balch <david.balch@conted.ox.ac.uk>
Date:   Wed, 10 Apr 2019 16:27:25 +0800
Tag:    v3.7.0-beta

MDL-65299 theme_classic: Allow default.scss theme-colors override.


commit dbbbeb89bfaf9dc1857380b5bfcab0d9338b73a6
Author: David Balch <david.balch@conted.ox.ac.uk>
Date:   Mon, 08 Apr 2019 22:36:31 +0800
Tag:    v3.7.0-beta

MDL-65299 Boost: Allow default.scss theme-colors override.