* Sketcher: Introduce Select All (Ctrl + A)
As the title says, this allows selecting all geometries on the sketch
with CTRL + A shortcut, plus also allows to select "Select All" option
from Edit menu.
* Sketcher: Use fmt instead of std::stringstream in selectAll
* Sketcher: Fix typo in selectAll
Co-authored-by: João Matos <joao@tritao.eu>
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Co-authored-by: João Matos <joao@tritao.eu>
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