URL validity is not checked

[ciubotaru]

Based on a comment from Marc Jay Cobbs (jay_cobbs@pod.geraspora.de), typing an invalid URL and checking the "Remember my choice" box will render the button unusable.

The plugin saves the choice in localStorage, which never expires. This becomes a problem under the following scenarios:

• The user wishes to switch to another pod. As some pods go offline and many others appear, the chances of switch are pretty high.
• The user uses several pods and accidentally checks the remember box. This will limit him/her to the saved URL and will make all the others inaccessible.
• The user decides to save an URL and accidentally mistypes it. This will make all pods inaccessible.

Apparently the decision to save the choice in localStoprage might need to be reconsidered.

[ciubotaru]

This issue boils down to whether we should allow users to shoot themselves in the leg. I guess we should. Closing.