Added syncing indicator to tmux status line

This checks for if the panes are synced or not, and provides and
indicator resembling it in  the status bar.

.tmux.conf.local

@@ -151,6 +151,7 @@ tmux_conf_theme_right_separator_sub='|'
 #     - #{pairing}
 #     - #{prefix}
 #     - #{root}
+#     - #{synchronized}
 #     - #{uptime_d}
 #     - #{uptime_h}
 #     - #{uptime_m}
@@ -158,7 +159,7 @@ tmux_conf_theme_right_separator_sub='|'
 #     - #{username}
 #     - #{username_ssh}
 tmux_conf_theme_status_left=' ❐ #S | ↑#{?uptime_d, #{uptime_d}d,}#{?uptime_h, #{uptime_h}h,}#{?uptime_m, #{uptime_m}m,} '
-tmux_conf_theme_status_right='#{prefix}#{pairing} #{?battery_status, #{battery_status},}#{?battery_bar, #{battery_bar},}#{?battery_percentage, #{battery_percentage},} , %R , %d %b | #{username}#{root} | #{hostname} '
+tmux_conf_theme_status_right='#{prefix}#{pairing}#{synchronized} #{?battery_status, #{battery_status},}#{?battery_bar, #{battery_bar},}#{?battery_percentage, #{battery_percentage},} , %R , %d %b | #{username}#{root} | #{hostname} '
 
 # status left style
 tmux_conf_theme_status_left_fg='#000000,#e4e4e4,#e4e4e4'  # black, white , white
@@ -188,6 +189,12 @@ tmux_conf_theme_root_fg='none'
 tmux_conf_theme_root_bg='none'
 tmux_conf_theme_root_attr='bold,blink'
 
+# synchronized indicator
+tmux_conf_theme_synchronized='🔒'     # U+1F512
+tmux_conf_theme_synchronized_fg='none'
+tmux_conf_theme_synchronized_bg='none'
+tmux_conf_theme_synchronized_attr='none'
+
 # battery bar symbols
 tmux_conf_battery_bar_symbol_full='◼'
 tmux_conf_battery_bar_symbol_empty='◻'