luci-base: give TextValue form elements separate readonly and disabled

textarea widgets have more value as readonly and not disabled, than
just disabled: you can scroll through them when they're readonly and
not disabled.

So give the form element separate readonly and disabled properties, so
textarea elements defined as readonly with a large amount of content
still cannot be modified, but at least the whole content can be viewed
(because the textarea scrollbars still function).

Signed-off-by: Paul Donald <[email protected]>

Author: systemcrash

modules/luci-base/htdocs/luci-static/resources/form.js

@@ -4601,7 +4601,8 @@ const CBITextValue = CBIValue.extend(/** @lends LuCI.form.TextValue.prototype */
 			rows: this.rows,
 			wrap: this.wrap,
 			validate: L.bind(this.validate, this, section_id),
-			disabled: (this.readonly != null) ? this.readonly : this.map.readonly
+			readonly: (this.readonly != null) ? this.readonly : this.map.readonly,
+			disabled: (this.disabled != null) ? this.disabled : null,
 		});
 
 		return widget.render();