Add new template for new specific filter issue report

Related feedback:
- uBlockOrigin/uBlock-issues#1541 (comment)

.github/ISSUE_TEMPLATE/specific_report_from_ubo.yml

@@ -0,0 +1,60 @@
+name: Report Specific Filter Issue From Popup Panel
+description: |
+  DO NOT manually choose THIS TEMPLATE TO REPORT ISSUES.
+  It's to be used by uBO version 1.38.7 and above through the new "Report" feature.
+body:
+  - type: checkboxes
+    attributes:
+      label: I tried to reproduce the issue when...
+      description: |
+        Perform these steps first to help unburden filter lists maintainers.
+      options:
+        - label: uBO is the only content blocker
+          description: |
+             Using other content blocker along uBO is known to cause issues.
+          required: true
+        - label: uBO with default settings/lists
+          description: |
+            Using  too many filter lists is known to cause issues.
+          required: true
+
+  - type: textarea
+    attributes:
+      label: URL address of the web page
+      description: |
+        Filled by uBO, leave it alone.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Category
+      description: |
+        Filled by uBO, leave it alone.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Describe the issue
+      description: |
+        Be as clear as possible: nobody can read mind, and nobody is looking at your issue over your shoulder.
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Screenshot(s)
+      description: |
+        Screenshot(s) for **difficult to describe visual issues are mandatory**. 
+        Post **links** instead of inline images for screenshots containing **adult material**.
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: Configuration
+      description: |
+        Filled by uBO, leave it alone.
+    validations:
+      required: true