@uppy/url: skip drag/dropped local files

[Murderlon]

Closes #5622

[github-actions]

Diff output files

diff --git a/packages/@uppy/url/lib/Url.js b/packages/@uppy/url/lib/Url.js
index e1045fc..8fe4623 100644
--- a/packages/@uppy/url/lib/Url.js
+++ b/packages/@uppy/url/lib/Url.js
@@ -57,12 +57,16 @@ export default class Url extends UIPlugin {
       });
     };
     this.addFile = async (protocollessUrl, optionalMeta) => {
+      if (protocollessUrl.startsWith("blob")) {
+        return undefined;
+      }
       const url = addProtocolToURL(protocollessUrl);
       if (!checkIfCorrectURL(url)) {
         this.uppy.log(`[URL] Incorrect URL entered: ${url}`);
         this.uppy.info(this.i18n("enterCorrectUrl"), "error", 4000);
         return undefined;
       }
+      this.uppy.log(`[URL] Adding file from dropped/pasted url: ${url}`);
       try {
         const meta = await this.getMeta(url);
         const tagFile = {
@@ -111,13 +115,11 @@ export default class Url extends UIPlugin {
     };
     this.handleRootDrop = e => {
       forEachDroppedOrPastedUrl(e.dataTransfer, "drop", url => {
-        this.uppy.log(`[URL] Adding file from dropped url: ${url}`);
         this.addFile(url);
       });
     };
     this.handleRootPaste = e => {
       forEachDroppedOrPastedUrl(e.clipboardData, "paste", url => {
-        this.uppy.log(`[URL] Adding file from pasted url: ${url}`);
         this.addFile(url);
       });
     };