PR: Move normal weather toolbutton from the hydrograph editor toolbar to the weather data manager toolbar

[jnsebgosselin]

Fixes #216 and should also Fixes #152

This has proven to be a little bit more work to implement than what was initially expected. By adding a new icon next the the weather datasets combobox, there was just not enough horizontal space anymore for the combobox.

So, the toolbar had to be split in two row. But, by doing that, this was aggravating furthermore Issue #152. The solution was to rethink how the infos of the currently selected water level and weather datasets are displayed in the UI. So instead of using a simple QTextEdit box, we now use a custom SpinBox that can be used to circle through the characteristics of the selected datasets, while taking up only one line of space.

In a future update, a button will be added next to the info spinbox that, when clicked, will pop-up a borderless window that will show all the infos of the selected dataset at once.

Now

Before

[pep8speaks]

Hello @jnsebgosselin! Thanks for submitting the PR.

• In the file gwhat/projet/manager_data.py, following are the PEP8 issues :

Line 785:80: E501 line too long (83 > 79 characters)