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
Let formatlesspaste plugin remove empty tags RT#57942

Previously, it would try to unwrap() an empty jQuery object to
remove an empty element, now it just removes an element if it's
empty.

(cherry picked from commit b0fa832b73c6d75c9836f6dbee6610f0bb968c5b)
Add travis configuration
[maven-release-plugin] prepare release alohaeditor-0.24.26
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release alohaeditor-0.24.26-commercial
Added generated changelog mapping
[maven-release-plugin] prepare for next development iteration