Fix some buttons acting like submits

src/servers/CreateServer.tsx

@@ -73,7 +73,7 @@ const CreateServer: FCWithDeps<CreateServerProps, CreateServerDeps> = ({ servers
         {!hasServers && (
           <ImportServersBtn tooltipPlacement="top" onImport={setServersImported} onError={setErrorImporting} />
         )}
-        {hasServers && <Button variant="secondary" onClick={goBack}>Cancel</Button>}
+        {hasServers && <Button type="button" variant="secondary" onClick={goBack}>Cancel</Button>}
         <Button type="submit">Create server</Button>
       </ServerForm>
 

src/servers/EditServer.tsx

@@ -44,7 +44,7 @@ const EditServer: FCWithDeps<EditServerProps, EditServerDeps> = withSelectedServ
         initialValues={selectedServer}
         onSubmit={handleSubmit}
       >
-        <Button variant="secondary" onClick={goBack}>Cancel</Button>
+        <Button type="button" variant="secondary" onClick={goBack}>Cancel</Button>
         <Button>Save</Button>
       </ServerForm>
     </NoMenuLayout>

src/servers/helpers/ImportServersBtn.tsx

@@ -84,7 +84,13 @@ const ImportServersBtn: FCWithDeps<ImportServersBtnConnectProps, ImportServersBt
 
   return (
     <>
-      <Button variant="secondary" id="importBtn" className={className} onClick={() => ref.current?.click()}>
+      <Button
+        type="button"
+        variant="secondary"
+        id="importBtn"
+        className={className}
+        onClick={() => ref.current?.click()}
+      >
         <FontAwesomeIcon icon={importIcon} fixedWidth /> {children ?? 'Import from file'}
       </Button>
       <UncontrolledTooltip placement={tooltipPlacement} target="importBtn">