Corrected a bug in the semantic source

Now the panel for the source won't be show when it's already show
Limited the max-size of the sources box
Merge pull request #4 from tcomte/semanticSources

Fix the semantic sources panel
Correction of a bug in the sources summary
Limited the max-size of the summary box
Hide the source select panel when switching tab
Added some transition effect in tab switch method
Merge pull request #5 from tcomte/semanticSources

Added visual effect to the semantic sources
Improved the layout of the input boxes
Merge pull request #6 from tcomte/semanticSources

Improved the layout of the input boxes
Merge pull request #20 from tcomte/master

Added visual effect to the semantic sources + correction of small bug