[Feature] Added depot viewport tooltips.

src/table/settings/settings.ini

@@ -4608,6 +4608,17 @@ def     = true
 str     = STR_CONFIG_SETTING_INDUSTRY_TOOLTIP_PRODUCED
 strhelp = STR_CONFIG_SETTING_INDUSTRY_TOOLTIP_PRODUCED_HELPTEXT
 
+[SDTC_VAR]
+var     = gui.depot_tooltip_mode
+type    = SLE_UINT8
+flags   = SF_NOT_IN_SAVE | SF_NO_NETWORK_SYNC | SF_GUI_DROPDOWN
+def     = 1
+min     = 0
+max     = 2
+str     = STR_CONFIG_SETTING_DEPOT_TOOLTIP_MODE
+strhelp = STR_CONFIG_SETTING_DEPOT_TOOLTIP_MODE_HELPTEXT
+strval  = STR_CONFIG_SETTING_DEPOT_TOOLTIP_MODE_OFF
+
 [SDTC_VAR]
 var      = gui.station_rating_tooltip_mode
 type     = SLE_UINT8