New check for block-level-elements

Performing unformatting on a selection adjacent to a terminal whitespace sometimes caused a <br> to be erroneously inserted.
For example: inside <sup>example <sup>, if you select "example" without the succeeding space and remove the upper case, then a <br> tag will be added.
The fix checks if the operation is within a block-level-element and does not add the <br> if it's not a block-level-element.
[maven-release-plugin] prepare release alohaeditor-0.24.21
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.24.21-commercial
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
Remove commercial changelog mapping.
IE: Right click on selected content not removes the selection.

The problem was that 'beforepaste' event was thrown when right clicking. The 'beforepaste' event was used to copy/paste content for IE. With this fix the 'beforepaste' event is not necessary any more, the whole copy/paste process is done in the 'paste' event. This solution is only for IE8 and below. For other IE versions (9 and above) the event 'beforepaste' is still needed.
align-plugin: Alignment inside table cells is now permitted.

Setting alignment inside a table cell was not permitted unless the cell content was wrapped inside a block element. With this fixed this action is now permitted.
[maven-release-plugin] prepare release alohaeditor-0.24.22
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.24.22-commercial
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration