title: Separating radioButtons in R shiny app with a line break
body: <p>I have a list of radioButtons on my shiny app that I am looking to separate into three groups, either with a Header, a blank space like a line or paragraph break, or even a line --------. 
  I tried to do this by creating three separate formTypes of buttons (formType1, formType2, formType3) but the functionality of the buttons stopped working. I don't know much HTML code, but the ones I tried wouldn't work in the radioButton code chunk. Can you help? Thanks. I've indicated where I want the radioButtons separated below with <code>**BREAK HERE**</code></p>
  
  <pre><code># Create Navigation Bar
     navbarPage("Navigation Bar",
       # Create a tab for data Entry
       tabPanel(
         "Data Entry",
         sidebarLayout(
           sidebarPanel(
             radioButtons(
               "formType", "Form Type",
               c("Basic Info &amp; Universal Flagging" = "basic_info",
                 "Universal Screening" = "uni_screening",
  
                 `**BREAK HERE**`
  
                 "BHAP Screening" = "bhap_screening",
                 "BHAP Intake &amp; Assessment" = "bhap_intakeassessment",
                 "BHAP Referral" = "bhap_referral", "BHAP Contact Info" = "bhap_contactinfo",
                 "BHAP Case Management" = "bhap_casemanagement", "BHAP Exit" = "bhap_exit", 
  
                 `**BREAK HERE**`
  
                 "COAP Intake" = "coap_intake", "COAP Assessment" = "coap_assessment", 
                 "Intercept 3: COAP In-Jail Servces" = "coap_injailservices",
                 "Intercept 4: COAP Support Services Needs" = "coap_supportservices",
                 "Intercept 4: COAP Reentry/Community-Based Referrals" = "coap_reentrycommunity",
                 "Provider Updates (In-Jail and Community-Based)" = "coap_providerupdates",
                 "COAP Contact Info" = "coap_contactinfo", "COAP Case Management" = "coap_casemanagement",
                 "COAP EXIT" = "coap_exit"))
             ),
  
           # outputs the dynamic UI component
            uiOutput("ui")
           )
         ),
  </code></pre>