[Qt] make warnings label selectable

src/qt/forms/overviewpage.ui

@@ -20,7 +20,7 @@
       <bool>false</bool>
      </property>
      <property name="styleSheet">
-      <string notr="true">background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop:0 #F0D0A0, stop:1 #F8D488); color:#000000;</string>
+      <string notr="true">QLabel { background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 0, stop:0 #F0D0A0, stop:1 #F8D488); color:#000000; }</string>
      </property>
      <property name="wordWrap">
       <bool>true</bool>
@@ -28,6 +28,9 @@
      <property name="margin">
       <number>3</number>
      </property>
+     <property name="textInteractionFlags">
+      <set>Qt::TextSelectableByMouse</set>
+     </property>
     </widget>
    </item>
    <item>