Fix terminator tab size

config

# ~/.config/terminator/config

[global_config]
  scroll_tabbar = True
[keybindings]
  switch_to_tab_1 = <Alt>1
  switch_to_tab_2 = <Alt>2
  switch_to_tab_3 = <Alt>3
  switch_to_tab_4 = <Alt>4
  switch_to_tab_5 = <Alt>5
  switch_to_tab_6 = <Alt>6
  switch_to_tab_7 = <Alt>7
  switch_to_tab_8 = <Alt>8
  switch_to_tab_9 = <Alt>9
[profiles]
  [[default]]
    background_color = "#002b36"
    cursor_color = "#aaaaaa"
    foreground_color = "#839496"
[layouts]
  [[default]]
    [[[window0]]]
      type = Window
      parent = ""
    [[[child1]]]
      type = Terminal
      parent = window0
      profile = default
[plugins]

gtk.css

// ~/.config/gtk-3.0/gtk.css


.terminator-terminal-window notebook tab {
    min-height: 0;
    padding: 0px;
}

.terminator-terminal-window notebook tab button {
    min-height: 0;
    min-width: 0;
    padding: 0px;
    margin: 0px;
}