Recompute webpage viewport dimensions when resizing html frames (Funded by Sourcepole QGIS Enterprise)
Call renderCachedImage after viewport has been computed
Update sip bindings, add method documentation
Merge pull request #1540 from manisandro/composer_html_fixes

Recompute webpage viewport dimensions when resizing html frames
Re-initialize relation editor on setRelationFeature

Fix #11236
Fix performance issues with moving selection on canvas (Funded by good will)

Fix #11197
Followup 96e39f7
Fix incorrectly failing composer html test
[composer] Use a transparent background for HTML items
[composer] Avoid Qt warnings with composer html item
Allow creation of new color palettes in color dialog
[FEATURE][composer] Option for current atlas feature as source for
attribute tables. Sponsored by City of Uster, Switzerland.
[FEATURE][composer] Add option for showing child features from a relation
for attribute tables in the composer. If selected, the attribute table
will show all related features to the current atlas feature within
the table body. Sponsored by City of Uster, Switzerland.
[FEATURE][composer] Add choice of display style for empty tables. Options
include hiding the entire table, showing empty cells, or displaying a
set message in the table body. Sponsored by City of Uster, Switzerland.
[FEATURE][composer] Add a checkbox to filter attribute tables to
features which intersect the current atlas feature. Sponsored by City
of Uster, Switzerland.
Make operations on the feature selection more memory friendly
Attribute form: do not try to edit non-editable fields
Add better Null support to QgsFilterLineEdit
Better QgsFilterLineEdit support for several edit widgets
Update sip bindings