Removed legacy QtUi/ClickableLabel and re-worked about dialog to use QLabel for terms of use label

Signed-off-by: Chris Galvan <chgalvan@amazon.com>

Code/Editor/AboutDialog.ui

@@ -181,14 +181,17 @@
           </spacer>
          </item>
          <item>
-          <widget class="ClickableLabel" name="m_transparentAgreement">
+          <widget class="QLabel" name="m_transparentAgreement">
            <property name="text">
-            <string>Terms of Use</string>
+            <string>&lt;a href=&quot;https://www.o3debinaries.org/license&quot;&gt;Terms of Use&lt;/a&gt;</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::RichText</enum>
            </property>
            <property name="alignment">
             <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
            </property>
-           <property name="showDecoration" stdset="0">
+           <property name="openExternalLinks">
             <bool>true</bool>
            </property>
           </widget>
@@ -274,11 +277,6 @@
    <extends>QWidget</extends>
    <header>qsvgwidget.h</header>
   </customwidget>
-  <customwidget>
-   <class>ClickableLabel</class>
-   <extends>QLabel</extends>
-   <header>QtUI/ClickableLabel.h</header>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>