title: How to fix label when I hover mouse over map made with tmap
body: <p>I plotted a map of Puerto Rico with poverty rate data by county (municipalities) using tmap. When I turn the interactive version on, I am able to click on the municipality and the correct data show up. </p>
  
  <p>However, when I hover my mouse over the municipalities, Puerto Rico's FIPS code (72) shows up in a white box. How can I change it so when I hover my mouse over the municipality, its name shows up instead of the 72?</p>
  
  <pre><code>#Create map plot
      PRmap2 &lt;- tm_shape(PRmap) +
        tm_fill("Pobreza",
            popup.vars = c("Municipio" = "COUNTY", "Pobreza (%)" = "Pobreza",
                         "Ingreso per cápita ($)" = "Ingreso_per_cápita"),
            title = "Pobreza (%)",
            style = "pretty",
            breaks = c(-Inf, 0, 20, 40, 60, Inf)) +
        tm_style(c("col_blind")) +
        tm_borders() +
        tm_layout("Pobreza en Puerto Rico",
          legend.title.size = 1.5,
          legend.text.size = 0.6,
          legend.position = c("left","bottom"),
          legend.bg.color = "white",
          legend.bg.alpha = 1)
  
  #Visualization mode changed to view so we can interact
  tmap_mode("view")
  
  #Interactive visualization
  PRmap2 + 
    tm_basemap(server = "OpenStreetMap.HOT")
  </code></pre>
  
  <p>You can find the interactive map here:
  <a href="http://rpubs.com/Javier_927/461125" rel="nofollow noreferrer">http://rpubs.com/Javier_927/461125</a></p>