Allow deselecting text with tap

[ghost]

2. Describe the feature request

When I select a text in an article (eithet by accident or on purpuse) I cannot remove the selection any way, only by selecting an option from the clipboard popup. This is really annoying.

I suggest to exit this text selection and the clipboard popup let these elements disappear when the user taps somewhere on the screen that is not the popup or the selection.

[dacancc]

臣附议

[chengnan049]

@DavisDcan 臣附议