Defaults: change default settings in a few editors

* Timeline has summary collapsed to show only one row of keyframes.
* Cavity default is screen space curvature (faster).
* Scripting workspace text editor uses syntax highlight and line numbers.
* Marker lines enabled by default in all animation editors.
* Movie clip editor pivot point default to median.

Ref T63986.

source/blender/blenkernel/intern/screen.c

@@ -859,6 +859,7 @@ void BKE_screen_view3d_shading_init(View3DShading *shading)
   shading->xray_alpha_wire = 0.5f;
   shading->cavity_valley_factor = 1.0f;
   shading->cavity_ridge_factor = 1.0f;
+  shading->cavity_type = V3D_SHADING_CAVITY_CURVATURE;
   shading->curvature_ridge_factor = 1.0f;
   shading->curvature_valley_factor = 1.0f;
   copy_v3_fl(shading->single_color, 0.8f);

source/blender/blenloader/intern/versioning_defaults.c

@@ -281,17 +281,45 @@ void BLO_update_defaults_startup_blend(Main *bmain, const char *app_template)
     }
 
     for (bScreen *screen = bmain->screens.first; screen; screen = screen->id.next) {
-      /* Hide channels in timelines. */
       for (ScrArea *sa = screen->areabase.first; sa; sa = sa->next) {
-        SpaceAction *saction = (sa->spacetype == SPACE_ACTION) ? sa->spacedata.first : NULL;
+        if (sa->spacetype == SPACE_ACTION) {
+          /* Show marker lines, hide channels and collapse summary in timelines. */
+          SpaceAction *saction = sa->spacedata.first;
+          saction->flag |= SACTION_SHOW_MARKER_LINES;
 
-        if (saction && saction->mode == SACTCONT_TIMELINE) {
-          for (ARegion *ar = sa->regionbase.first; ar; ar = ar->next) {
-            if (ar->regiontype == RGN_TYPE_CHANNELS) {
-              ar->flag |= RGN_FLAG_HIDDEN;
+          if (saction->mode == SACTCONT_TIMELINE) {
+            saction->ads.flag |= ADS_FLAG_SUMMARY_COLLAPSED;
+
+            for (ARegion *ar = sa->regionbase.first; ar; ar = ar->next) {
+              if (ar->regiontype == RGN_TYPE_CHANNELS) {
+                ar->flag |= RGN_FLAG_HIDDEN;
+              }
             }
           }
         }
+        else if (sa->spacetype == SPACE_GRAPH) {
+          SpaceGraph *sipo = sa->spacedata.first;
+          sipo->flag |= SIPO_MARKER_LINES;
+        }
+        else if (sa->spacetype == SPACE_NLA) {
+          SpaceNla *snla = sa->spacedata.first;
+          snla->flag |= SNLA_SHOW_MARKER_LINES;
+        }
+        else if (sa->spacetype == SPACE_TEXT) {
+          /* Show syntax and line numbers in Script workspace text editor. */
+          SpaceText *stext = sa->spacedata.first;
+          stext->showsyntax = true;
+          stext->showlinenrs = true;
+        }
+        else if (sa->spacetype == SPACE_VIEW3D) {
+          /* Screen space cavity by default for faster performance. */
+          View3D *v3d = sa->spacedata.first;
+          v3d->shading.cavity_type = V3D_SHADING_CAVITY_CURVATURE;
+        }
+        else if (sa->spacetype == SPACE_CLIP) {
+          SpaceClip *sclip = sa->spacedata.first;
+          sclip->around = V3D_AROUND_CENTER_MEDIAN;
+        }
       }
     }
 

source/blender/editors/space_action/space_action.c

@@ -71,7 +71,7 @@ static SpaceLink *action_new(const ScrArea *sa, const Scene *scene)
   saction->autosnap = SACTSNAP_FRAME;
   saction->mode = SACTCONT_DOPESHEET;
   saction->mode_prev = SACTCONT_DOPESHEET;
-  saction->flag = SACTION_SHOW_INTERPOLATION;
+  saction->flag = SACTION_SHOW_INTERPOLATION | SACTION_SHOW_MARKER_LINES;
 
   saction->ads.filterflag |= ADS_FILTER_SUMMARY;
 

source/blender/editors/space_clip/space_clip.c

@@ -250,7 +250,7 @@ static SpaceLink *clip_new(const ScrArea *sa, const Scene *scene)
   sc->zoom = 1.0f;
   sc->path_length = 20;
   sc->scopes.track_preview_height = 120;
-  sc->around = V3D_AROUND_LOCAL_ORIGINS;
+  sc->around = V3D_AROUND_CENTER_MEDIAN;
 
   /* header */
   ar = MEM_callocN(sizeof(ARegion), "header for clip");

source/blender/editors/space_graph/space_graph.c

@@ -81,7 +81,7 @@ static SpaceLink *graph_new(const ScrArea *UNUSED(sa), const Scene *scene)
 
   /* settings for making it easier by default to just see what you're interested in tweaking */
   sipo->ads->filterflag |= ADS_FILTER_ONLYSEL;
-  sipo->flag |= SIPO_SELVHANDLESONLY;
+  sipo->flag |= SIPO_SELVHANDLESONLY | SIPO_MARKER_LINES;
 
   /* header */
   ar = MEM_callocN(sizeof(ARegion), "header for graphedit");

source/blender/editors/space_nla/space_nla.c

@@ -70,6 +70,7 @@ static SpaceLink *nla_new(const ScrArea *sa, const Scene *scene)
 
   /* set auto-snapping settings */
   snla->autosnap = SACTSNAP_FRAME;
+  snla->flag = SNLA_SHOW_MARKER_LINES;
 
   /* header */
   ar = MEM_callocN(sizeof(ARegion), "header for nla");