replace proteins by peptides on button text

src/gui/peptide_list_view/peptide_view.ui

@@ -40,21 +40,21 @@
       <item>
        <widget class="QCheckBox" name="hideNotValidCheckBox">
         <property name="text">
-         <string>show only valid proteins</string>
+         <string>show only valid peptides</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QCheckBox" name="hideNotCheckedCheckBox">
         <property name="text">
-         <string>show only checked proteins</string>
+         <string>show only checked peptides</string>
         </property>
        </widget>
       </item>
       <item>
        <widget class="QCheckBox" name="hideNotGroupedCheckBox">
         <property name="text">
-         <string>show only grouped proteins</string>
+         <string>show only grouped peptides</string>
         </property>
        </widget>
       </item>