Bug 1659849 - Enable <dialog> to fix some automation test failures r=emilio

Some <dialog> related tests are failing on Beta because this
element is not enabled, enabling them to make the test pass.

Differential Revision: https://phabricator.services.mozilla.com/D87609

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/__dir__.ini

@@ -0,0 +1 @@
+prefs: [dom.dialog_element.enabled:true]

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/abspos-dialog-layout.html.ini

@@ -1,5 +1,4 @@
 [abspos-dialog-layout.html]
-  prefs:[dom.dialog_element.enabled:true]
   [The dialog should be centered regardless of the presence of a horizontal scrollbar.]
     expected:
       if (os != "android"): FAIL

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-autofocus-just-once.html.ini

@@ -1,3 +0,0 @@
-[dialog-autofocus-just-once.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-autofocus-multiple-times.html.ini

@@ -1,3 +0,0 @@
-[dialog-autofocus-multiple-times.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-autofocus.html.ini

@@ -1,3 +0,0 @@
-[dialog-autofocus.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-close.html.ini

@@ -1,2 +0,0 @@
-[dialog-close.html]
-  prefs: [dom.dialog_element.enabled:true]

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-enabled.html.ini

@@ -1,3 +0,0 @@
-[dialog-enabled.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-focusing-steps-prevent-autofocus.html.ini

@@ -1,3 +0,0 @@
-[dialog-focusing-steps-prevent-autofocus.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-form-submission.html.ini

@@ -1,2 +0,0 @@
-[dialog-form-submission.html]
-  prefs: [dom.dialog_element.enabled:true]

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-open.html.ini

@@ -1,2 +0,0 @@
-[dialog-open.html]
-  prefs: [dom.dialog_element.enabled:true]

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-return-value.html.ini

@@ -1,3 +0,0 @@
-[dialog-return-value.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-showModal-remove.html.ini

@@ -1,3 +0,0 @@
-[dialog-showModal-remove.html]
-  prefs: [dom.dialog_element.enabled:true]
-

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/dialog-showModal.html.ini

@@ -1,2 +0,0 @@
-[dialog-showModal.html]
-  prefs: [dom.dialog_element.enabled:true]

testing/web-platform/meta/html/semantics/interactive-elements/the-dialog-element/show-modal-focusing-steps.html.ini

@@ -1,3 +0,0 @@
-[show-modal-focusing-steps.html]
-  prefs: [dom.dialog_element.enabled:true]
-