qt: Fix TxViewDelegate layout

This change (1) prevents overlapping date and amount strings,
and (2) guaranties that "eye" sign at the end of the watch-only
address/label is always visible.

src/qt/forms/overviewpage.ui

@@ -517,6 +517,9 @@
             <property name="horizontalScrollBarPolicy">
              <enum>Qt::ScrollBarAlwaysOff</enum>
             </property>
+            <property name="sizeAdjustPolicy">
+             <enum>QAbstractScrollArea::AdjustToContents</enum>
+            </property>
             <property name="selectionMode">
              <enum>QAbstractItemView::NoSelection</enum>
             </property>