Merge pull request #1387 from luca76/patch-1

Fix a string
svg search path fix, fixes #8664
Fix #10350 - Run update on return in field calc bar
Pass distance area into field calc bar
Add tooltip to map unit scale edit button
Improve map unit scale dialog title and add descriptive
try to remove spaces and quotes to get a fieldname from an expression
Promote rendererChanged() signal from raster+vector layer to base map layer
[layertree] Add expand/collapse all actions to legend menu
[layertree] Fix broken signal connection
Inverted polygon renderer: add an option to preprocess polygons using an union
[layertree] Use QgisApp implementation of remove layers

That one also asks whether to 1. save changes to layers, 2. really remove
[processing] Search for description files also in the sub-directories of the script/model directory
Inverted polygon renderer: make sure the each symbol category is always rendered in the same order
[processing] Allow algorithm providers to set the allowed output raster extensions if needed
[processing] Add some missing algorithms
[processing] Fix problem with displaying R graphs
[processing] Make sure the log tab is visible before executing an algorithm
[processing] Update Processing toolbox when a provider is added or removed
[TRANSUP] fi by Kari, sv by Victor

Signed-off-by: Werner Macho <werner.macho@gmail.com>