UI: Move Properties path pin button next to the data-path

The pin button should be next to the data-path, which is what it belongs to.

Note that this makes the placement of the search button in the header look
quite off. That is because it's centered to the absolute header width, not the
width of the main region (which is smaller because of the tab region on the
left).
Technically it's correct that way, visually it looks wrong. This will be
addressed in a followup commit.

release/scripts/addons

@@ -1 +1 @@
-Subproject commit 8ad9de7c1e1022dee907ddce78f4c357111fc09e
+Subproject commit 33eae7da675d532bbb9c12b129c0e30228f5f000

release/scripts/addons_contrib

@@ -1 +1 @@
-Subproject commit 26a8b2eadc7abb2a30fac50eb5505aa24daf5785
+Subproject commit eae381b698248e70e4a3c62bdf239f9d5a0470a9

release/scripts/startup/bl_ui/space_properties.py

@@ -35,10 +35,6 @@ class PROPERTIES_HT_header(Header):
 
         layout.separator_spacer()
 
-        row = layout.row()
-        row.emboss = 'NONE'
-        row.operator("buttons.toggle_pin", icon=('PINNED' if view.use_pin_id else 'UNPINNED'), text="")
-
 
 class PROPERTIES_PT_navigation_bar(Panel):
     bl_space_type = 'PROPERTIES'

source/blender/editors/space_buttons/buttons_context.c

@@ -1163,6 +1163,15 @@ static void buttons_panel_context_draw(const bContext *C, Panel *panel)
 
     first = false;
   }
+
+  uiLayout *pin_row = uiLayoutRow(row, false);
+  uiLayoutSetAlignment(pin_row, UI_LAYOUT_ALIGN_RIGHT);
+  uiItemSpacer(pin_row);
+  uiLayoutSetEmboss(pin_row, UI_EMBOSS_NONE);
+  uiItemO(pin_row,
+          "",
+          (sbuts->flag & SB_PIN_CONTEXT) ? ICON_PINNED : ICON_UNPINNED,
+          "BUTTONS_OT_toggle_pin");
 }
 
 void buttons_context_register(ARegionType *art)