never allow deselecting dropdown items

src/components/SelectWithTooltip.tsx

@@ -36,6 +36,7 @@ export const SelectWithTooltip = ({
       data={data}
       disabled={disabled}
       clearable={clearable}
+      allowDeselect={false}
     />
   </div>
 );

src/components/screens/Launch/ConfigFileManager.tsx

@@ -109,6 +109,7 @@ export const ConfigFileManager = ({
               leftSection={<File size={16} />}
               searchable
               clearable={false}
+              allowDeselect={false}
             />
           </div>
           <Button

src/components/screens/Launch/GeneralTab/BackendSelector.tsx

@@ -70,6 +70,7 @@ export const BackendSelector = () => {
               disabled: b.disabled,
             }))}
             disabled={isLoadingBackends || availableBackends.length === 0}
+            allowDeselect={false}
             renderOption={({ option }) => {
               const backendData = availableBackends.find(
                 (b) => b.value === option.value

src/components/screens/Launch/GeneralTab/GpuDeviceSelector.tsx

@@ -68,6 +68,7 @@ export const GpuDeviceSelector = ({
               }
             }}
             data={deviceOptions}
+            allowDeselect={false}
           />
         </div>
 

src/components/settings/GeneralTab.tsx

@@ -267,6 +267,7 @@ export const GeneralTab = ({
             disabled: !isFrontendAvailable(config.value),
           }))}
           leftSection={<Monitor style={{ width: rem(16), height: rem(16) }} />}
+          allowDeselect={false}
         />
 
         <Box mt="sm">