fix: increase label field length to 255 chars

Some custom field labels were getting truncated when exceeding 140 characters.

This caused issues during customization of complex forms where descriptive labels were required.

frappe/custom/doctype/custom_field/custom_field.json

@@ -85,6 +85,7 @@
    "fieldtype": "Data",
    "in_filter": 1,
    "label": "Label",
+   "length": 255,
    "no_copy": 1,
    "oldfieldname": "label",
    "oldfieldtype": "Data"
@@ -468,11 +469,12 @@
    "label": "Placeholder"
   }
  ],
+ "grid_page_length": 50,
  "icon": "fa fa-glass",
  "idx": 1,
  "index_web_pages_for_search": 1,
  "links": [],
- "modified": "2024-09-28 20:19:35.935720",
+ "modified": "2025-10-10 11:10:23.862393",
  "modified_by": "Administrator",
  "module": "Custom",
  "name": "Custom Field",
@@ -501,6 +503,7 @@
    "write": 1
   }
  ],
+ "row_format": "Dynamic",
  "search_fields": "dt,label,fieldtype,options",
  "sort_field": "creation",
  "sort_order": "DESC",