Show paths instead of URLs in attachment warning

This removes the file:// prefix, which is unnecessarily technical and doesn't add information

src/editor/warningwidgets/attachmentaddedfromexternalwarning.cpp

@@ -5,6 +5,9 @@
 */
 
 #include "attachmentaddedfromexternalwarning.h"
+
+#include <QUrl>
+
 #include <KLocalizedString>
 
 AttachmentAddedFromExternalWarning::AttachmentAddedFromExternalWarning(QWidget *parent)
@@ -20,9 +23,22 @@ AttachmentAddedFromExternalWarning::~AttachmentAddedFromExternalWarning() = defa
 
 void AttachmentAddedFromExternalWarning::setAttachmentNames(const QStringList &lst)
 {
-    if (lst.count() == 1) {
-        setText(i18n("This attachment: <ul><li>%1</li></ul> was added externally. Remove it if it's an error.", lst.at(0)));
+    QStringList attachments;
+
+    for (const QString &item : lst) {
+        QUrl url(item);
+
+        if (url.isLocalFile()) {
+            attachments << url.toLocalFile();
+        } else {
+            attachments << item;
+        }
+    }
+
+    if (attachments.count() == 1) {
+        setText(i18n("This attachment: <ul><li>%1</li></ul> was added externally. Remove it if it's an error.", attachments.at(0)));
     } else {
-        setText(i18n("These attachments: <ul><li>%1</li></ul> were added externally. Remove them if it's an error.", lst.join(QLatin1String("</li><li>"))));
+        setText(
+            i18n("These attachments: <ul><li>%1</li></ul> were added externally. Remove them if it's an error.", attachments.join(QLatin1String("</li><li>"))));
     }
 }