Drawing 1.0.2

• fix the default value of the text background option (as reported by #521 and #559)
• fix a scenario where saving without transparency would consistently fail
• automatically reload the picture after saving
• mitigate initial state of the "filters" tool if "blur" is selected (#577)
• change the keyboard shortcuts to switch tabs
• remove from the highlighter the (ineffective) UI to change the active cairo operator
• change the UI of the selection tools to improve readability of various items
• fix typos in the user help manual
• change the label of the "toggle the preview" menu item (#137)
• update several translations