fix(filter): Filter input fits in column without bootstrap

I noticed that filter inputs where not staying in their respective columns without bootstrap, this
addresses that issue.

Author: Portugal, Marcelo

src/less/footer.less

@@ -69,17 +69,3 @@
     border-right: 0;
   }
 }
-
-input[type="text"].ui-grid-filter-input {
-  padding: 0 18px 0 0;
-  margin: 0;
-  border: 0;
-  width: 100%;
-
-  border: @gridBorderWidth solid  @borderColor;
-  .border-radius(@gridBorderRadius);
-
-  &:hover {
-    border: @gridBorderWidth solid  @borderColor;
-  }
-}

src/less/header.less

@@ -210,6 +210,7 @@
 }
 
 input[type="text"].ui-grid-filter-input {
+  box-sizing: border-box;
   padding: 0 18px 0 0;
   margin: 0;
   border: 0;