fix the transaction deadline errors

src/components/Settings/index.tsx

@@ -94,6 +94,8 @@ const MenuFlyout = styled.span`
   ${({ theme }) => theme.mediaWidth.upToMedium`
     min-width: 18.125rem;
   `};
+
+  user-select: none;
 `
 
 const Break = styled.div`

src/components/TransactionSettings/index.tsx

@@ -136,12 +136,17 @@ export default function TransactionSettings({ placeholderSlippage }: Transaction
     if (value.length === 0) {
       setDeadline(DEFAULT_DEADLINE_FROM_NOW)
     } else {
+      try {
         const parsed: number = Math.floor(Number.parseFloat(value) * 60)
-      if (!Number.isInteger(parsed) || parsed < 60) {
+        if (!Number.isInteger(parsed) || parsed < 60 || parsed > 180 * 60) {
           setDeadlineError(DeadlineError.InvalidInput)
         } else {
           setDeadline(parsed)
         }
+      } catch (error) {
+        console.error(error)
+        setDeadlineError(DeadlineError.InvalidInput)
+      }
     }
   }
 

src/state/user/reducer.ts

@@ -96,7 +96,12 @@ export default createReducer(initialState, (builder) =>
 
       // deadline isnt being tracked in local storage, reset to default
       // noinspection SuspiciousTypeOfGuard
-      if (typeof state.userDeadline !== 'number' || !Number.isInteger(state.userDeadline) || state.userDeadline < 60) {
+      if (
+        typeof state.userDeadline !== 'number' ||
+        !Number.isInteger(state.userDeadline) ||
+        state.userDeadline < 60 ||
+        state.userDeadline > 180 * 60
+      ) {
         state.userDeadline = DEFAULT_DEADLINE_FROM_NOW
       }