rtl option irreversible

[hgourvest]

using BubbleConfigBuilder you can change to RTL but you can't revert this setting to LTR. I would suggest this:

public BubbleConfigBuilder rtl(boolean value) {
    this.rtl = value;
    return this;
}

[woxingxiao]

The default is from left to right. Why bother?

[hgourvest]

I need to let the user change the reading direction when he want, it is for a comic book reader.

[woxingxiao]

Suggestion accepted!

[hgourvest]

thanks!