tagtabs: show tab separators in tag tabs

This changes tag tabs to actually put the bank in search mode, still
without providing any search input, so that the bank tab builder will
draw tab separators (both the separator line and tab text label)

runelite-api/src/main/java/net/runelite/api/ScriptID.java

@@ -296,4 +296,7 @@ public final class ScriptID
 
 	@ScriptArguments(integer = 19)
 	public static final int BANKMAIN_FINISHBUILDING = 505;
+
+	@ScriptArguments()
+	public static final int BANKMAIN_SEARCHING = 514;
 }