Rework the project list in home tab

[uclaros]

Fixes #3214

Change the way the active project is displayed on top of the list in Home tab into a less hacky one.

Now the ProjectsModel gets a activeProjectId property which if set, then one can use the new Roles::ProjectIsActiveProject role on the model's contents.

We then split the projects list into two sections based on this new role.

Roles::ProjectIsActiveProject may be a bit misleading, as it might not return true on the active project, rather on the one passed into ProjectsModel::activeProjectId

[github-actions[bot]]

Pull Request Test Coverage Report for Build 8705282585

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 133 unchanged lines in 4 files lost coverage.
• Overall coverage increased (+0.3%) to 60.365%

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Files with Coverage Reduction	New Missed Lines	%
input/app/projectsmodel.h	2	25.0%
input/app/projectsproxymodel.cpp	15	59.65%
input/app/projectsmodel.cpp	55	69.17%
input/app/mmstyle.h	61	2.01%
<!--	Total:	133		-->

Totals
Change from base Build 8663502430:	0.3%
Covered Lines:	7635
Relevant Lines:	12648

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