fix: add multiselect to compatibility layer

module-legacy/instance_skel_types.d.ts

@@ -115,11 +115,12 @@ export type SomeCompanionInputField =
 	| CompanionInputFieldTextWithVariablesInput
 	| CompanionInputFieldDropdown
 	| CompanionInputFieldMultiDropdown
+	| CompanionInputFieldMultiselect
 	| CompanionInputFieldNumber
 	| CompanionInputFieldCheckbox
 export interface CompanionInputField {
 	id: string
-	type: 'text' | 'textinput' | 'textwithvariables' | 'dropdown' | 'colorpicker' | 'number' | 'checkbox'
+	type: 'text' | 'textinput' | 'textwithvariables' | 'dropdown' | 'colorpicker' | 'number' | 'checkbox' | 'multiselect'
 	label: string
 	tooltip?: string
 	isVisible?: (options: any /*CompanionActionEvent | CompanionFeedbackEvent*/) => boolean // TODO - this varies based on where it is used, and in this current structure is not possible to type without breaking every module
@@ -152,6 +153,7 @@ export interface CompanionInputFieldDropdown extends CompanionInputFieldDropdown
 	regex?: string
 }
 export interface CompanionInputFieldMultiDropdown extends CompanionInputFieldDropdownBase {
+	type: 'dropdown'
 	multiple: true
 	default: ConfigValue[]
 
@@ -172,6 +174,23 @@ export interface CompanionInputFieldDropdownBase extends CompanionInputField {
 	/** The minimum number of entries the dropdown must have before it allows searching */
 	minChoicesForSearch?: number
 }
+
+export interface CompanionInputFieldMultiselect extends CompanionInputFieldDropdownBase {
+	type: 'multiselect'
+	default: ConfigValue[]
+
+	required?: boolean
+
+	choices: DropdownChoice[]
+
+	/** The minimum number of selected values */
+	minSelection?: number
+	/** The maximum number of selected values */
+	maxSelection?: number
+
+	/** The minimum number of entries the dropdown must have before it allows searching */
+	minChoicesForSearch?: number
+}
 export interface CompanionInputFieldCheckbox extends CompanionInputField {
 	type: 'checkbox'
 	default: boolean

module-legacy/src/fakeSystem.ts

@@ -121,7 +121,8 @@ export function convertInputField(input: SomeCompanionInputField): Complete<Modu
 				default: input.default,
 			})
 		case 'dropdown':
-			if (input.multiple) {
+		case 'multiselect':
+			if (input.multiple || input.type === 'multiselect') {
 				return literal<Complete<ModuleApi.CompanionInputFieldMultiDropdown>>({
 					...convertInputFieldBase(input),
 					type: 'multidropdown',