update ux for text area

Author: chadgauth

.changeset/bright-trains-crash.md

@@ -0,0 +1,10 @@
+---
+"roo-cline": minor
+---
+
+UX fixes that:
+
+- Allow dropdowns to be controlled when text box is disabled
+- Seperates and clarifies buttons and dropdowns from inputs
+- Adds a secondary placeholder for easier visibility of mode controls
+- Updates to tailwind standard