Add `inset` to stylelintrc

(cherry picked from commit 6a49f3989a17898c957df8777f0cbb19af647804)

Closes #2456

frontend/.stylelintrc

@@ -82,6 +82,7 @@
           "right",
           "bottom",
           "left",
+          "inset",
           "z-index",
           "display",
           "visibility",

frontend/src/Components/Form/TagInputInput.css

@@ -1,9 +1,9 @@
 .inputContainer {
+  inset: -1px;
   display: flex;
   align-items: start;
   flex-wrap: wrap;
   padding: 1px 16px;
   min-height: 33px;
   cursor: default;
-  inset: -1px;
 }