Include support for both param sets

The parameters for calibration were changed in the latest master. QGC
needs to work with both. Hacked in for now, waiting on a true parameter
re-mapping implementation.

There's also a partial fix for the databits and stopbits. I'm unsure how to deal with the logic
around the 'is_cdc' variable, as I can't really follow what it's for.

Controls respect QGCPalette settings. Also added test window.

Since this is generic Qml support not specific to FactSystem

Fixing braces
Changing data plot save files to csv only
Fixing LinechartWidget::startLogging() as it no longer needs to worry about a proper file name being set.

Fixes Issue #1162

Changing the order of the QGCFileDialog::getSaveFileName() function. The idea was to expand the existing QFileDialog version but as we removed the selectedFilter, we might as well make this more intuitive. The options argument is the one trully optional and should be last.
Adding an example to the documentation on how to go about figuring out what file type was returned by these functions.

Removed the “selectedFilter” argument from the QGCFileDialog functions along with references to it in unit tests.
Fixed function declarations and prototypes formatting while at it.
Changed the caption of a few file save dialogs with a more descriptive text (explicitly telling what is being saved).

Added a dialog asking the user about overwritting an existing file.

Remove erroneous use of QFileDialog::selectNameFilter(). No filters are to be selected. The argument selectedFilter is a pointer to a String to receive the filter selected/used by the user.

- Central widget no longer stacked. Views are added/removed to layout
to switch view
- Dock Widgets are globals with single instance of each type
- Both central views and dock widgets are just-in-time created saving
lots of memory