Bug 19402 Ability to filter messages by size

patch by mark@standard8.demon.co.uk r=neil sr=bienvenu

suite/locales/en-US/chrome/mailnews/FilterEditor.dtd

@@ -6,6 +6,7 @@
 <!ENTITY keyword.label "keyword">
 <!ENTITY age.label "age in days">
 <!ENTITY to.label "to">
+<!ENTITY size.label "size">
 
 <!-- LOCALIZATION NOTE (cc.label): DONT_TRANSLATE -->
 <!ENTITY cc.label "Cc">

suite/locales/en-US/chrome/mailnews/search-attributes.properties

@@ -8,12 +8,12 @@
 6=To
 7=Cc
 8=To or cc
-# 9-15, not visible
+# 9-15, not visible, but 13 now is
 9=Location
 10=Message Key
 11=Age In Days
 12=Folder Info
-13=Size
+13=Size (KB)
 14=AnyText
 15=Keywords
 # for AB and LDAP