Splash: add first time setup and templates to splash screen.

The first time setup screen only has the interaction preset currently, some
more work is needed to be able to set e.g. the language or compute device
here as in the mockups.

The splash screen stayed the same for now, to make room for the templates
most of the links are now in the Help menu. If there are no recent files yet
the links still show.

The splash screen buttons implementation was fully moved to Python, in the
WM_MT_splash menu.

release/scripts/startup/bl_ui/space_topbar.py

@@ -287,7 +287,7 @@ class TOPBAR_MT_file(Menu):
         layout = self.layout
 
         layout.operator_context = 'INVOKE_AREA'
-        layout.menu("TOPBAR_MT_file_new", text="New", icon='NEW')
+        layout.menu("TOPBAR_MT_file_new", text="New", icon='FILE')
         layout.operator("wm.open_mainfile", text="Open...", icon='FILE_FOLDER')
         layout.menu("TOPBAR_MT_file_open_recent")
         layout.operator("wm.revert_mainfile")
@@ -373,25 +373,51 @@ class TOPBAR_MT_file_new(Menu):
 
         return sorted(app_templates)
 
-    def draw_ex(self, context, *, use_splash=False, use_default=False):
-        layout = self.layout
-
-        # now draw the presets
+    def draw_ex(layout, context, *, use_splash=False, use_more=False):
         layout.operator_context = 'EXEC_DEFAULT'
 
-        if use_default:
-            props = layout.operator("wm.read_homefile", text="General")
+        # Limit number of templates in splash screen, spill over into more menu.
+        paths = TOPBAR_MT_file_new.app_template_paths()
+        splash_limit = 5
+
+        if use_splash:
+            icon = 'FILE'
+            show_more = len(paths) > (splash_limit - 1)
+            if show_more:
+                paths = paths[:splash_limit - 2]
+        elif use_more:
+            icon = 'FILE'
+            paths = paths[splash_limit - 2:]
+            show_more = False
+        else:
+            icon = 'NONE'
+            show_more = False
+
+        # Draw application templates.
+        if not use_more:
+            props = layout.operator("wm.read_homefile", text="General", icon=icon)
             props.app_template = ""
 
-        for d in TOPBAR_MT_file_new.app_template_paths():
+        for d in paths:
             props = layout.operator(
                 "wm.read_homefile",
                 text=bpy.path.display_name(d),
+                icon=icon,
             )
             props.app_template = d
 
+        if show_more:
+            layout.menu("TOPBAR_MT_templates_more", text="...")
+
     def draw(self, context):
-        self.draw_ex(context, use_splash=False, use_default=True)
+        TOPBAR_MT_file_new.draw_ex(self.layout, context)
+
+
+class TOPBAR_MT_templates_more(Menu):
+    bl_label = "Templates"
+
+    def draw(self, context):
+        bpy.types.TOPBAR_MT_file_new.draw_ex(self.layout, context, use_more=True)
 
 
 class TOPBAR_MT_file_import(Menu):
@@ -591,13 +617,24 @@ class TOPBAR_MT_help(Menu):
         layout.operator(
             "wm.url_open", text="Blender Website", icon='URL',
         ).url = "https://www.blender.org"
-        layout.operator(
-            "wm.url_open", text="Blender Store", icon='URL',
-        ).url = "https://store.blender.org"
-
         layout.operator(
             "wm.url_open", text="Release Notes", icon='URL',
         ).url = "https://www.blender.org/download/releases/%d-%d/" % bpy.app.version[:2]
+        layout.operator(
+            "wm.url_open", text="Credits", icon='URL',
+        ).url = "https://www.blender.org/about/credits/"
+
+        layout.separator()
+
+        layout.operator(
+            "wm.url_open", text="Blender Store", icon='URL',
+        ).url = "https://store.blender.org"
+        layout.operator(
+            "wm.url_open", text="Development Fund", icon='URL'
+        ).url = "https://www.blender.org/foundation/development-fund/"
+        layout.operator(
+            "wm.url_open", text="Donate", icon='URL',
+        ).url = "https://www.blender.org/foundation/donation-payment/"
 
         layout.separator()
 
@@ -622,7 +659,7 @@ class TOPBAR_MT_file_specials(Menu):
         layout = self.layout
 
         layout.operator_context = 'INVOKE_AREA'
-        layout.operator("wm.read_homefile", text="New", icon='NEW')
+        layout.operator("wm.read_homefile", text="New", icon='FILE')
         layout.operator("wm.open_mainfile", text="Open...", icon='FILE_FOLDER')
 
         layout.separator()
@@ -708,6 +745,7 @@ classes = (
     TOPBAR_MT_editor_menus,
     TOPBAR_MT_file,
     TOPBAR_MT_file_new,
+    TOPBAR_MT_templates_more,
     TOPBAR_MT_file_import,
     TOPBAR_MT_file_export,
     TOPBAR_MT_file_external_data,