confirm upload popups: limit size of loaded images

src/gui/Popups/ConfirmClipboardUploadPopup.qml

@@ -53,6 +53,7 @@ HColumnPopup {
 
         source: "image://clipboard/" + updateCounter
         fillMode: Image.PreserveAspectFit
+        sourceSize.width: popup.contentWidthLimit
 
         Layout.fillWidth: true
         Layout.fillHeight: true

src/gui/Popups/ConfirmUploadPopup.qml

@@ -49,6 +49,7 @@ HColumnPopup {
         source: popup.filePath
         fillMode: Image.PreserveAspectFit
         visible: status !== Image.Error
+        sourceSize.width: popup.contentWidthLimit
 
         Layout.fillWidth: true
         Layout.fillHeight: true

src/gui/Popups/HColumnPopup.qml

@@ -8,6 +8,8 @@ HPopup {
 
     default property alias pageData: page.columnData
 
+    property int contentWidthLimit: theme.controls.popup.defaultWidth
+
     readonly property alias page: page
 
     signal keyboardAccept()
@@ -16,8 +18,7 @@ HPopup {
     HColumnPage {
         id: page
         implicitWidth: Math.min(
-            popup.maximumPreferredWidth,
-            theme.controls.popup.defaultWidth,
+            popup.maximumPreferredWidth, popup.contentWidthLimit,
         )
         implicitHeight: Math.min(
             popup.maximumPreferredHeight,