ui-test: Expand topic does not handle non unique topics

[bj00rn]

expandTopic logic is broken, it does not work for nodes that share the same name on different levels.

I had to change the logic since playwright is prevented from expanding hidden nodes by accessibility. I.e to expand lamp of topic livingroom/lamps/lamp, livingroom->lamps->lamp must be expanded in sequence.

the current logic will not work when you have multiple topics with lamp in the path

livingroom/lamps/lamp
kitchen/lamps/lamp

MQTT-Explorer/src/spec/util/expandTopic.ts

Line 36 in c88978f

const selectors = topics.map(v => `span[data-test-topic='${v}']`)