UI: Initial User-Preferences redesign

Implements the first changes for T54115:

* Rename "User Preferences" window to "Settings" in the UI.
  We'll likely put workspace settings in there, separate from the global
  user settings. System settings should become separate from user
  settings in future to allow settings for specific hardware.
* Add sidebar region for navigation (scrolls independently).
  Addresses space problems, so we can add more categories as needed now.
* Increase size of Settings window to compensate new navigation bar.
* Group sections into User Preferences and System.
  Icons for section groups by Andrzej Ambroz. Thanks!
* Bumps subversion for file compatibility.

Screenshot: https://developer.blender.org/F5715337

I also added categories for future work, but commented them out.
We may also want to redesign contents of each section now.

Reviewers: brecht, campbellbarton
Differential Revision: https://developer.blender.org/D3088
Design Task: https://developer.blender.org/T54115

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_screen.h b/source/blender/blenkernel/BKE_screen.h
index 0d766e83299..75d2ed0d0bc 100644
--- a/source/blender/blenkernel/BKE_screen.h
+++ b/source/blender/blenkernel/BKE_screen.h
@@ -319,6 +319,10 @@ void BKE_spacedata_freelist(ListBase *lb);
 void BKE_spacedata_copylist(ListBase *lb1, ListBase *lb2);
 void BKE_spacedata_draw_locks(int set);
 
+struct ARegion *BKE_spacedata_find_region_type(
+        const struct SpaceLink *slink, const struct ScrArea *sa,
+        int region_type) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL();
+
 void BKE_spacedata_callback_id_remap_set(
         void (*func)(struct ScrArea *sa, struct SpaceLink *sl, struct ID *old_id, struct ID *new_id));
 void BKE_spacedata_id_unref(struct ScrArea *sa, struct SpaceLink *sl, struct ID *id);
@@ -332,7 +336,7 @@ void            BKE_screen_area_free(struct ScrArea *sa);
 void BKE_region_callback_free_gizmomap_set(void (*callback)(struct wmGizmoMap *));
 void BKE_region_callback_refresh_tag_gizmomap_set(void (*callback)(struct wmGizmoMap *));
 
-struct ARegion *BKE_area_find_region_type(struct ScrArea *sa, int type);
+struct ARegion *BKE_area_find_region_type(const struct ScrArea *sa, int type);
 struct ARegion *BKE_area_find_region_active_win(struct ScrArea *sa);
 struct ARegion *BKE_area_find_region_xy(struct ScrArea *sa, const int regiontype, int x, int y);
 struct ScrArea *BKE_screen_find_area_from_space(struct bScreen *sc, struct SpaceLink *sl) ATTR_WARN_UNUSED_RESULT ATTR_NONNULL(1, 2);