rtl support and fix some non critical warnings

.idea/deploymentTargetSelector.xml

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="deploymentTargetSelector">
-    <selectionStates>
-      <SelectionState runConfigName="app">
-        <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2026-03-12T19:54:01.237140412Z">
-          <Target type="DEFAULT_BOOT">
-            <handle>
-              <DeviceId pluginId="PhysicalDevice" identifier="serial=a703e092" />
-            </handle>
-          </Target>
-        </DropdownSelection>
-        <DialogSelection />
-      </SelectionState>
-    </selectionStates>
-  </component>
-</project>

app/src/main/java/sh/sar/isodroid/ui/screens/DownloadsScreen.kt

@@ -22,8 +22,8 @@ import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.OpenInNew
 import androidx.compose.material.icons.filled.Download
-import androidx.compose.material.icons.filled.OpenInNew
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -68,9 +68,9 @@ private fun loadOsDownloads(context: Context): List<OsDownload> {
                 OsDownload(
                     name = obj.getString("name"),
                     category = obj.getString("category"),
-                    subcategory = if (obj.isNull("subcategory")) null else obj.optString("subcategory", null),
+                    subcategory = if (obj.isNull("subcategory")) null else obj.optString("subcategory"),
                     description = obj.optString("description", ""),
-                    icon = if (obj.isNull("icon")) null else obj.optString("icon", null),
+                    icon = if (obj.isNull("icon")) null else obj.optString("icon"),
                     url = obj.getString("url")
                 )
             )
@@ -280,7 +280,7 @@ private fun DownloadItem(
             }
         }
         Icon(
-            imageVector = Icons.Default.OpenInNew,
+            imageVector = Icons.AutoMirrored.Filled.OpenInNew,
             contentDescription = "Open in browser",
             tint = MaterialTheme.colorScheme.onSurfaceVariant,
             modifier = Modifier.size(20.dp)