50325 Throw when trying to load an empty file (a: error message, a: images, cla: yes, framework, waiting for tree to go green)

50345 Update RefreshIndicator documentation to clarify the need for the child to be scrollable (cla: yes, f: material design, framework, waiting for tree to go green)

50354 Use strut box heights to calculate selection rectangles in order to ensure that they remain within visible bounds (a: text input, cla: yes, framework, severe: API break, waiting for tree to go green)

50355 Nested TickerMode cannot turn tickers back on (cla: yes, f: material design, framework, waiting for tree to go green)

50362 Implements the navigator page api (cla: yes, f: routes, framework, team)