AI config panel cleanup/styling

- editable inputs styled
- moved API model selectors from AIConfig to API Panel
- nicer WI Entry footer spacing
- corrected WI Entry textarea height calculations
- centered send_textarea placeholder
.mes_text now wraps anywhere to prevent long strings from overflowing-X
- placeholders added to a few inputs

public/scripts/world-info.js

@@ -309,7 +309,7 @@ function appendWorldEntry(entry) {
 
 async function resetScrollHeight(element) {
     await delay(1);
-    const height = Number($(element).prop("scrollHeight")) + 1;
+    const height = Number($(element).prop("scrollHeight")) + 3;
     $(element).css("height", "");
     $(element).css("height", `${height}px`);
 }