fix: Grid filterLtOperator message

Updated translations in fr-FR, bg-BG and en-US.

Author: svetq

messages/grid/grid.bg-BG.yml

@@ -70,7 +70,7 @@ kendo:
     filterLteOperator: Е по-малко или равно на
 
     # The text of the "less than" filter operator
-    filterLtOperator: Е по-малко или равно на
+    filterLtOperator: Е по-малко от
 
     # The text of the "Is true" filter option
     filterIsTrue: е вярно

messages/grid/grid.en-US.yml

@@ -70,7 +70,7 @@ kendo:
     filterLteOperator: Is less than or equal to
 
     # The text of the "less than" filter operator
-    filterLtOperator: Is less than or equal to
+    filterLtOperator: Is less than
 
     # The text of the "Is true" filter option
     filterIsTrue: is true

messages/grid/grid.fr-FR.yml

@@ -70,7 +70,7 @@ kendo:
     filterLteOperator: Est inférieur ou égal à
 
     # The text of the "less than" filter operator
-    filterLtOperator: Est inférieur ou égal à
+    filterLtOperator: Est inférieur
 
     # The text of the "Is true" filter option
     filterIsTrue: est vrai