Fix dropdown alignments in new compare

app/views/projects/merge_requests/creations/_new_compare.html.haml

@@ -21,7 +21,7 @@
                   selected: f.object.source_project_id
           .merge-request-select.dropdown
             = f.hidden_field :source_branch
-            = dropdown_toggle f.object.source_branch || "Select source branch", { toggle: "dropdown", field_name: "#{f.object_name}[source_branch]" }, { toggle_class: "js-compare-dropdown js-source-branch git-revision-dropdown-toggle" }
+            = dropdown_toggle f.object.source_branch || "Select source branch", { toggle: "dropdown", display: 'static', field_name: "#{f.object_name}[source_branch]" }, { toggle_class: "js-compare-dropdown js-source-branch git-revision-dropdown-toggle" }
             .dropdown-menu.dropdown-menu-selectable.dropdown-source-branch.git-revision-dropdown
               = dropdown_title("Select source branch")
               = dropdown_filter("Search branches")
@@ -51,7 +51,7 @@
                   selected: f.object.target_project_id
           .merge-request-select.dropdown
             = f.hidden_field :target_branch
-            = dropdown_toggle f.object.target_branch, { toggle: "dropdown", field_name: "#{f.object_name}[target_branch]" }, { toggle_class: "js-compare-dropdown js-target-branch git-revision-dropdown-toggle" }
+            = dropdown_toggle f.object.target_branch, { toggle: "dropdown", display: 'static', field_name: "#{f.object_name}[target_branch]" }, { toggle_class: "js-compare-dropdown js-target-branch git-revision-dropdown-toggle" }
             .dropdown-menu.dropdown-menu-selectable.dropdown-target-branch.js-target-branch-dropdown.git-revision-dropdown
               = dropdown_title("Select target branch")
               = dropdown_filter("Search branches")