Composer Map: add an option to "View layer (and style) combination in map canvas"

[qgib]

Author Name: Harrissou Santanna (@DelazJ)
Original Redmine Issue: 14901

Redmine category:map_composer/printing

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Presets are a quick way to view combination of layers/styles in the map canvas (or composer map).
What can be a big improvement would be a "View style combination in map canvas" button (like the "View extent in map canvas" one) to set visible in the map canvas the current (layer + style) combination from print composer map item (especially when a preset is not set, this can be a quick way to update composer map).

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• easy_fix was configured as 0