Improvements to the usability of the number entry widgets (Priority, Level Emitter, Craft Amount): (#4737)

- Fixed tab order
- Introduced focus state for corner buttons
- Allowed the player to enter any text, but add validation that only persist it if it is a valid number
- Enter will now confirm these dialogs and return to the previous dialog
- The text field is automatically focused and its contents are selected

src/main/java/appeng/fluids/container/FluidStorageBusContainer.java

@@ -128,7 +128,7 @@ public class FluidStorageBusContainer extends FluidConfigurableContainer {
     public void detectAndSendChanges() {
         this.verifyPermissions(SecurityPermissions.BUILD, false);
 
-        if (Platform.isServer()) {
+        if (isServer()) {
             this.setFuzzyMode((FuzzyMode) this.getUpgradeable().getConfigManager().getSetting(Settings.FUZZY_MODE));
             this.setReadWriteMode(
                     (AccessRestriction) this.getUpgradeable().getConfigManager().getSetting(Settings.ACCESS));