Fixed the display of broker cards on a phone
On a strategy's page, every broker that offers it has its card, with its execution score or, short of measures, a note that there are not enough yet. On a phone, those cards took one margin too many around their header and their content: the logo drifted from the edge, and the note sat in a shrunken frame in the middle of the card. The card gets its proportions back, edge to edge, and the broker page's strategy cards, which are the same cards, with it.