Incorporate Donate page header image.

Part of porting donate site to main Tor site.
This allows adding centered header image on donate pages.

Issue #48275

content/donate/contents.lr

@@ -4,7 +4,7 @@ frequency: both
 ---
 default_frequency_for_both: single
 ---
-section: 
+section:
 ---
 title: Donate
 ---
@@ -80,6 +80,6 @@ tshirt_perk_single_image: /static/images/donate/t-shirt-take-back-internet.png
 ---
 tshirt_perk_monthly_label: T-Shirt
 ---
-tshirt_pack_perk_monthly_image: /static/images/donate/t-shirt-pack-take-back-internet.png
----
 tshirt_perk_monthly_image: /static/images/donate/t-shirt-take-back-internet.png
+---
+image: /static/images/donate/donate-header.png

lego @ d2927b01

-Subproject commit d7048fd32adab5c4e5c55309046265d11981017a
+Subproject commit d2927b0127d207b51e06fff39fe3595ebe0a4a31

models/donate-form.ini

@@ -36,6 +36,10 @@ translate = False
 label = Body
 type = markdown
 
+[fields.image]
+label = Header Image (centered)
+type = string
+
 [fields.single_one]
 label = Single Price 1 (in US cents)
 type = integer