[qt] Do not translate `~`

src/qt/forms/modaloverlay.ui

@@ -267,7 +267,7 @@ QLabel { color: rgb(40,40,40);  }</string>
              <item>
               <widget class="QLabel" name="percentageProgress">
                <property name="text">
-                <string>~</string>
+                <string notr="true">~</string>
                </property>
               </widget>
              </item>

src/qt/locale/bitcoin_en.ts

@@ -1139,12 +1139,7 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location line="+9"/>
+        <location line="+34"/>
-        <source>~</source>
-        <translation type="unfinished"></translation>
-    </message>
-    <message>
-        <location line="+25"/>
         <source>Progress increase per hour</source>
         <translation type="unfinished"></translation>
     </message>