Reset button text to default

This is to avoid Qt auto-generating code like this:
  `buttonAdd->setText(QStringLiteral(""));`
Which makes no sense and triggers clazy warning (Wclazy-empty-qstringliteral).

src/gui/cookiesdialog.ui

@@ -45,11 +45,7 @@
         </spacer>
        </item>
        <item>
-        <widget class="QToolButton" name="buttonAdd">
+        <widget class="QToolButton" name="buttonAdd"/>
-         <property name="text">
-          <string notr="true"/>
-         </property>
-        </widget>
        </item>
        <item>
         <spacer name="verticalSpacer">
@@ -68,11 +64,7 @@
         </spacer>
        </item>
        <item>
-        <widget class="QToolButton" name="buttonDelete">
+        <widget class="QToolButton" name="buttonDelete"/>
-         <property name="text">
-          <string notr="true"/>
-         </property>
-        </widget>
        </item>
        <item>
         <spacer name="verticalSpacer_3">

src/gui/deletionconfirmationdialog.ui

@@ -66,9 +66,6 @@
        <property name="toolTip">
         <string>Remember choice</string>
        </property>
-       <property name="text">
-        <string notr="true"/>
-       </property>
        <property name="iconSize">
         <size>
          <width>24</width>

src/gui/optionsdialog.ui

@@ -2987,11 +2987,7 @@ Use ';' to split multiple entries. Can use wildcard '*'.</string>
                  </property>
                  <layout class="QGridLayout" name="gridLayout_11">
                   <item row="0" column="0">
-                   <widget class="QLabel" name="lblSslCertStatus">
+                   <widget class="QLabel" name="lblSslCertStatus"/>
-                    <property name="text">
-                     <string notr="true"/>
-                    </property>
-                   </widget>
                   </item>
                   <item row="0" column="1">
                    <widget class="QLabel" name="lblWebUiCrt">
@@ -3028,11 +3024,7 @@ Use ';' to split multiple entries. Can use wildcard '*'.</string>
                    </layout>
                   </item>
                   <item row="1" column="0">
-                   <widget class="QLabel" name="lblSslKeyStatus">
+                   <widget class="QLabel" name="lblSslKeyStatus"/>
-                    <property name="text">
-                     <string notr="true"/>
-                    </property>
-                   </widget>
                   </item>
                   <item row="1" column="1">
                    <widget class="QLabel" name="lblWebUiKey">