fix: various issues with ProgressDialog and SequentialTasks

- Fix aborting sequential tasks
- Fix displaying wrong number of tasks concluded
- Fix text cutting when the URL is too big

launcher/ui/dialogs/ProgressDialog.ui

@@ -40,6 +40,12 @@
    </item>
    <item row="2" column="0">
     <widget class="QLabel" name="statusLabel">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
      <property name="text">
       <string>Task Status...</string>
      </property>