stylesheets: rename *.css.scss -> *.scss.

Fixes "DEPRECATION WARNING: Extra .css in SCSS file is unnecessary."

app/assets/stylesheets/specific/uploads.scss

@@ -0,0 +1,50 @@
+div#c-uploads {
+  div#a-new {
+    div#upload-guide-notice {
+      margin-bottom: 2em;
+    }
+
+    ul#links {
+      margin-bottom: 1em;
+    }
+
+    label[for="upload_as_pending"] {
+      display: inline;
+    }
+
+    fieldset.ratings {
+      label {
+        display: inline;
+      }
+    }
+
+    textarea {
+      margin-bottom: 0.5em;
+    }
+
+    .hint {
+      display: block;
+    }
+
+    div#source-info {
+      margin: 1em 0;
+      padding: 1em;
+      border: 1px solid gray;
+      min-height: 5em;
+
+      p {
+        margin: 0;
+      }
+
+      ul {
+        a {
+          margin-right: 1em;
+        }
+      }
+    }
+
+    div.field_with_errors {
+      display: inline;
+    }
+  }
+}