[Explorer]: minor fixes (#10690)

## Description 

- Update paddings on `HomeMetrics` to be able to scroll to the edge of
container
- https://mysten.atlassian.net/browse/APPS-747


![scrollarea](https://user-images.githubusercontent.com/127577476/231021442-1644fe09-8b33-44f1-9714-c82c297d0c1a.gif)


## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and not a breaking change, you can
skip the following section. Otherwise, please indicate what changed, and
then add to the Release Notes section as highlighted during the release
process.

### Type of Change (Check all that apply)

- [x] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

---------

Co-authored-by: Phong Lam <[email protected]>

apps/explorer/src/components/HomeMetrics/MetricGroup.tsx

@@ -13,13 +13,13 @@ interface Props {
 export function MetricGroup({ label, children }: Props) {
     return (
         <div className="flex flex-col gap-4">
-            <div className="flex items-center gap-2.5">
+            <div className="flex items-center gap-2.5 px-8">
                 <Text variant="caption/semibold" color="steel-darker">
                     {label}
                 </Text>
                 <div className="h-px flex-1 bg-steel/30" />
             </div>
-            <div className="flex items-start gap-10 overflow-x-auto overflow-y-hidden pb-1">
+            <div className="flex items-start gap-6 overflow-x-auto overflow-y-hidden pb-1 pl-8 md:gap-8">
                 {children}
             </div>
         </div>

apps/explorer/src/components/HomeMetrics/index.tsx

@@ -27,7 +27,9 @@ function StatsWrapper(props: StatsProps) {
 function FormattedStatsAmount({
     amount,
     ...props
-}: Omit<StatsProps, 'children'> & { amount?: string | number | bigint }) {
+}: Omit<StatsProps, 'children'> & {
+    amount?: string | number | bigint;
+}) {
     const [formattedAmount, postfix] = formatAmountParts(amount);
 
     return (
@@ -64,12 +66,14 @@ export function HomeMetrics() {
     );
 
     return (
-        <Card spacing="lg">
-            <Heading variant="heading4/semibold" color="steel-darker">
-                Sui Network Stats
-            </Heading>
+        <Card spacing="none">
+            <div className="pl-8 pt-8">
+                <Heading variant="heading4/semibold" color="steel-darker">
+                    Sui Network Stats
+                </Heading>
+            </div>
 
-            <div className="mt-8 space-y-7">
+            <div className="mt-8 space-y-7 pb-8">
                 <MetricGroup label="Current">
                     <StatsWrapper
                         label="TPS Now / Peak 30D"