qt: move third-party tx URL setting from Display to Wallet options tab

Out of all the settings in the Display tab, the 'Third-party
transaction URLs' is the odd one out. All other settings here
affect the way the GUI is displayed. This action affects what
context menu actions are available when wallet functionality
is enabled, and we have a transaction. As such, it is a better
fit for this to be in the Wallet tab.

Author: jarolrod

src/qt/forms/optionsdialog.ui

@@ -216,6 +216,33 @@
          </property>
         </widget>
        </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_3_Display">
+         <item>
+          <widget class="QLabel" name="thirdPartyTxUrlsLabel">
+           <property name="toolTip">
+            <string>Third-party URLs (e.g. a block explorer) that appear in the transactions tab as context menu items. %s in the URL is replaced by transaction hash. Multiple URLs are separated by vertical bar |.</string>
+           </property>
+           <property name="text">
+            <string>&amp;Third-party transaction URLs</string>
+           </property>
+           <property name="buddy">
+            <cstring>thirdPartyTxUrls</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="thirdPartyTxUrls">
+           <property name="toolTip">
+            <string>Third-party URLs (e.g. a block explorer) that appear in the transactions tab as context menu items. %s in the URL is replaced by transaction hash. Multiple URLs are separated by vertical bar |.</string>
+           </property>
+           <property name="placeholderText">
+            <string notr="true">https://example.com/tx/%s</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
        <item>
         <widget class="QGroupBox" name="groupBox">
          <property name="title">
@@ -724,33 +751,6 @@
          </item>
         </layout>
        </item>
-       <item>
-        <layout class="QHBoxLayout" name="horizontalLayout_3_Display">
-         <item>
-          <widget class="QLabel" name="thirdPartyTxUrlsLabel">
-           <property name="toolTip">
-            <string>Third-party URLs (e.g. a block explorer) that appear in the transactions tab as context menu items. %s in the URL is replaced by transaction hash. Multiple URLs are separated by vertical bar |.</string>
-           </property>
-           <property name="text">
-            <string>&amp;Third-party transaction URLs</string>
-           </property>
-           <property name="buddy">
-            <cstring>thirdPartyTxUrls</cstring>
-           </property>
-          </widget>
-         </item>
-         <item>
-          <widget class="QLineEdit" name="thirdPartyTxUrls">
-           <property name="toolTip">
-            <string>Third-party URLs (e.g. a block explorer) that appear in the transactions tab as context menu items. %s in the URL is replaced by transaction hash. Multiple URLs are separated by vertical bar |.</string>
-           </property>
-           <property name="placeholderText">
-            <string notr="true">https://example.com/tx/%s</string>
-           </property>
-          </widget>
-         </item>
-        </layout>
-       </item>
        <item>
         <widget class="QGroupBox" name="font_groupBox">
          <property name="title">