Update the icons

Remove no longer used icons, add a new one and replace one or two old
icons by new ones.

src/MainWindow.ui

@@ -114,7 +114,7 @@
          </property>
          <property name="icon">
           <iconset resource="icons/icons.qrc">
-           <normaloff>:/oldimages/searchfind</normaloff>:/oldimages/searchfind</iconset>
+           <normaloff>:/icons/searchfind</normaloff>:/icons/searchfind</iconset>
          </property>
          <property name="checkable">
           <bool>true</bool>
@@ -719,6 +719,10 @@
    </property>
   </action>
   <action name="viewPreferencesAction">
+   <property name="icon">
+    <iconset resource="icons/icons.qrc">
+     <normaloff>:/icons/settings</normaloff>:/icons/settings</iconset>
+   </property>
    <property name="text">
     <string>&amp;Preferences</string>
    </property>
@@ -761,7 +765,7 @@
   <action name="helpWhatsThisAction">
    <property name="icon">
     <iconset resource="icons/icons.qrc">
-     <normaloff>:/oldimages/whatis</normaloff>:/oldimages/whatis</iconset>
+     <normaloff>:/icons/whatis</normaloff>:/icons/whatis</iconset>
    </property>
    <property name="text">
     <string>What's This?</string>

src/icons/icons.qrc

@@ -12,9 +12,6 @@
         <file alias="field_edit">page_edit.png</file>
         <file alias="field_delete">page_delete.png</file>
         <file alias="field_add">page_add.png</file>
-        <file alias="add">add.png</file>
-        <file alias="save">accept.png</file>
-        <file alias="cancel">bullet_black.png</file>
         <file alias="field">page_green.png</file>
         <file alias="table">table.png</file>
         <file alias="index">tag_blue.png</file>
@@ -25,12 +22,13 @@
         <file alias="trigger">script.png</file>
         <file alias="trigger_create">script_add.png</file>
         <file alias="trigger_delete">script_delete.png</file>
+        <file alias="searchfind">magnifier.png</file>
+        <file alias="settings">wrench.png</file>
+        <file alias="whatis">help.png</file>
     </qresource>
     <qresource prefix="/oldimages">
         <file alias="128">oldimages/128.png</file>
         <file alias="icon16">oldimages/icone16.png</file>
         <file alias="log">oldimages/log.png</file>
-        <file alias="searchfind">oldimages/searchfind.png</file>
-        <file alias="whatis">oldimages/whatis.png</file>
     </qresource>
 </RCC>