Merge bitcoin-core/gui#298: Peertableview alternating row colors

e94920a qt: peertableview alternating row colors (randymcmillan)

Pull request description:

  peers-tab: enable alternating row colors for peer table and banned table

ACKs for top commit:
  Bosch-0:
    tACK bitcoin-core/gui@e94920a on Windows 10 - works as intended. Before / after below:
  jarolrod:
    tACK e94920a

Tree-SHA512: 05ba18e1db9700bbd68644fe02292409f4e5c52e301b1b2977c335d1ff16456a93fb0b15c8c8385d1b15f648141341990706d530f6b08ecb33098fa941b9af1f

src/qt/forms/debugwindow.ui

@@ -791,6 +791,9 @@
              <property name="tabKeyNavigation">
               <bool>false</bool>
              </property>
+             <property name="alternatingRowColors">
+              <bool>true</bool>
+             </property>
              <property name="textElideMode">
               <enum>Qt::ElideMiddle</enum>
              </property>
@@ -847,6 +850,9 @@
              <property name="tabKeyNavigation">
               <bool>false</bool>
              </property>
+             <property name="alternatingRowColors">
+              <bool>true</bool>
+             </property>
              <property name="sortingEnabled">
               <bool>true</bool>
              </property>