Fix string version of begins_with

Signed-off-by: Vinzenz Feenstra <evilissimo@gmail.com>
Adding unit tests for begins_with

Signed-off-by: Vinzenz Feenstra <evilissimo@gmail.com>
Export linear/angular velocity sleep threshold;Change default linear velocity sleep threshold to 0.1;Fixed type treshold
Fix LineEdit select method binding
Auto select custom property value field when pop up, user can start typing to change value right away.
Merge pull request #152 from marynate/PR-ux-property-field-auto-select

Auto select custom property value field when pop up
Merge pull request #151 from marynate/PR-fix-line-edit-bind-select

Fix LineEdit select method binding
Merge pull request #147 from vinzenz/string-improvements

begins_with string version fix
Merge pull request #150 from marynate/PR-export-physics-sleep-threshold

Export linear/angular velocity sleep threshold to project settings
Merge remote-tracking branch 'upstream/master' into dev