Use "Any Label" and "Any Milestone" in selects rather than the ambiguous "Any" option

app/models/label.rb

@@ -17,7 +17,7 @@ class Label < ActiveRecord::Base
   # Requests that have no label assigned.
   LabelStruct = Struct.new(:title, :name)
   None = LabelStruct.new('No Label', 'No Label')
-  Any = LabelStruct.new('Any', '')
+  Any = LabelStruct.new('Any Label', '')
 
   DEFAULT_COLOR = '#428BCA'
 

app/models/milestone.rb

@@ -16,9 +16,9 @@
 class Milestone < ActiveRecord::Base
   # Represents a "No Milestone" state used for filtering Issues and Merge
   # Requests that have no milestone assigned.
-  MilestoneStruct = Struct.new(:title, :name)
-  None = MilestoneStruct.new('No Milestone', 'No Milestone')
-  Any = MilestoneStruct.new('Any', '')
+  MilestoneStruct = Struct.new(:title, :name, :id)
+  None = MilestoneStruct.new('No Milestone', 'No Milestone', 0)
+  Any = MilestoneStruct.new('Any Milestone', '', -1)
 
   include InternalId
   include Sortable