Add UI for setting solution transfer amount (#4074)

* basic eui and window

* finish EUI, update defaults

* unnecessary usings

* convert to bounduserinterface

* merge me up

merge me up inside

* Fix repeated define for component in prototype

* impl swept UI suggestion

* apply discord reviews

* small changes

Resources/Locale/en-US/ui/transfer-amount.ftl

@@ -0,0 +1,13 @@
+### Loc for the transfer amount eui window
+
+## Title
+
+ui-transfer-amount-title = Change Transfer Amount
+
+## Text for the button to apply changes
+
+ui-transfer-amount-apply = Set Amount
+
+## Placeholder text for the amount line edit
+
+ui-transfer-amount-line-edit-placeholder = Amount