Clear Selection of other tables.

When there are several tables in the same editable and you select cells in one table and then in other table, the selection in the first table is not cleared.
Loop optimizations.

Several loops which works with tables didn't have good performance
Merge pull request #1011 from najor/hotfix-table-clear-selection

Hotfix table clear selection
Merge pull request #1012 from najor/hotfix-table-loop-for-optimization

Loop optimizations.
Merge branch 'hotfix' of https://github.com/alohaeditor/Aloha-Editor into hotfix