Fix list placement of the character picker options for the characterpicker-plugin.

On screens with lower resolutions the list for picking special characters is cut off at the window borders.
This is because the cell size gets overwritten and the list is always placed at the characterpicker button position.
Readjust the character list placement and the cell size.
Merge pull request #1173 from rainerda/hotfix-0.24.x-rt56795-characterpicker-list-placement

Characterpicker list cut off at borders
characeterpicker-plugin: code improvements
[maven-release-plugin] prepare release alohaeditor-0.24.25
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.24.25-commercial
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
Merge pull request #1176 from najor/hotfix-0.24.x-code-improvements

Hotfix 0.24.x code improvements
Minor code clean up after merge
Remove bogus mapping
Merge branch 'hotfix-0.24.x' of github.com:alohaeditor/Aloha-Editor into hotfix

Conflicts:
	pom.xml
	src/css/aloha.css